Gr 8 Natural Sciences Ch 2.1 SUM: Atoms
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Questions and Answers

What is the definition of matter?

  • Anything that has mass but occupies no volume
  • Anything that occupies volume but has no weight
  • Anything that has mass and occupies volume (correct)
  • Anything that occupies volume but has no mass

    • What is an element?

  • A substance that can be broken down into simpler substances
  • A substance that cannot be broken down into simpler substances by chemical means (correct)
  • A mixture of two or more substances
  • A type of atom

    • What is the function of the Periodic Table of Elements?

  • To classify living organisms
  • To show the atomic structure of an element
  • To list all the known elements (correct)
  • To show the different types of chemical reactions

    • Who introduced the concept of atoms to the scientific world?

    <p>John Dalton</p> Signup and view all the answers

    What is the meaning of the term 'atomos'?

    <p>Indivisible</p> Signup and view all the answers

    What is a scientific model?

    <p>A simplified representation of a complex concept or phenomenon</p> Signup and view all the answers

    What is a postulate?

    <p>A fundamental principle or assumption that is accepted without proof</p> Signup and view all the answers

    What is the main idea of John Dalton's postulates?

    <p>That elements are made up of atoms</p> Signup and view all the answers

    What is the main assumption of Dalton's atomic theory?

    <p>Atoms are the smallest particles.</p> Signup and view all the answers

    What is the purpose of scientific models?

    <p>To understand complex concepts.</p> Signup and view all the answers

    What is the central part of an atom called?

    <p>Atomic nucleus</p> Signup and view all the answers

    What determines the identity of an element?

    <p>Atomic number</p> Signup and view all the answers

    What is the charge of neutrons?

    <p>Neutral</p> Signup and view all the answers

    What is the function of electrons in an atom?

    <p>To orbit the atomic nucleus</p> Signup and view all the answers

    What is the difference between isotopes of the same element?

    <p>Number of neutrons</p> Signup and view all the answers

    What is the purpose of the atomic model?

    <p>To understand the behavior of atoms.</p> Signup and view all the answers

    What is an element?

    <p>A substance that consists of only one type of atom.</p> Signup and view all the answers

    What is the significance of protons in an atom?

    <p>They determine the atomic number.</p> Signup and view all the answers

    What is the significance of the arrangement of electrons in an atom?

    <p>Determines the chemical properties and reactivity of an element</p> Signup and view all the answers

    What is the modern model of the atom often referred to as?

    <p>Electron cloud model</p> Signup and view all the answers

    What is a pure substance?

    <p>A material made of only one kind of matter throughout</p> Signup and view all the answers

    What is the difference between elements and compounds?

    <p>Elements are pure substances that consist of only one kind of atom, while compounds are made up of two or more different kinds of atoms</p> Signup and view all the answers

    What is a chemical bond?

    <p>The force that holds atoms together in a molecule</p> Signup and view all the answers

    What is an example of a compound?

    <p>Water (H2O)</p> Signup and view all the answers

    What is the result when hydrogen and oxygen combine to form water?

    <p>A liquid at room temperature</p> Signup and view all the answers

    What is the significance of understanding pure substances in chemistry?

    <p>To understand chemical reactions and properties</p> Signup and view all the answers

    What is a molecule?

    <p>A group of atoms bonded together</p> Signup and view all the answers

    What is an example of a diatomic molecule?

    <p>Oxygen (O2)</p> Signup and view all the answers

    What does a chemical formula represent?

    <p>The type and number of atoms in a molecule</p> Signup and view all the answers

    What occurs in decomposition reactions?

    <p>A single compound breaks down into two or more simpler substances</p> Signup and view all the answers

    What are the two main events that occur in any chemical reaction?

    <p>Breaking of chemical bonds and forming of new chemical bonds</p> Signup and view all the answers

    What is a characteristic of a pure substance?

    <p>It consists of only one type of matter throughout</p> Signup and view all the answers

    What is an example of a diatomic molecule?

    <p>Oxygen (O2)</p> Signup and view all the answers

    What is a characteristic of a mixture?

    <p>It can be separated by physical means</p> Signup and view all the answers

    What is the difference between an element and a compound?

    <p>An element is made up of only one kind of atom, while a compound is made up of two or more kinds of atoms</p> Signup and view all the answers

    What is an example of a mixture?

    <p>Air (a mixture of oxygen, nitrogen, carbon dioxide, and other gases)</p> Signup and view all the answers

    How can mixtures be classified?

    <p>As pure substances or mixtures</p> Signup and view all the answers

    What is the main difference between a pure substance and a mixture?

    <p>A pure substance is composed of only one type of matter, while a mixture is composed of two or more types of matter</p> Signup and view all the answers

    What type of mixture is air classified as?

    <p>Homogeneous</p> Signup and view all the answers

    What category does gold (Au) fall under?

    <p>Element</p> Signup and view all the answers

    Which of the following is an example of a heterogeneous mixture?

    <p>Rocks</p> Signup and view all the answers

    What is the classification of sugar (C12H22O11)?

    <p>Compound</p> Signup and view all the answers

    What type of mixture is milk classified as?

    <p>Heterogeneous</p> Signup and view all the answers

    What is the classification of nitrogen gas (N2)?

    <p>Element</p> Signup and view all the answers

    What is the classification of steel (alloy of iron and carbon)?

    <p>Homogeneous mixture</p> Signup and view all the answers

    What type of mixture is granite classified as?

    <p>Heterogeneous</p> Signup and view all the answers

    What is the primary function of the Periodic Table of Elements?

    <p>To represent the atomic number and symbol of each element</p> Signup and view all the answers

    What was the significance of John Dalton's reintroduction of the concept of atoms?

    <p>It provided a fundamental explanation for the composition of matter</p> Signup and view all the answers

    What is the key characteristic that distinguishes one element from another?

    <p>Atomic number</p> Signup and view all the answers

    What is the term for the smallest unit of a chemical element?

    <p>Atom</p> Signup and view all the answers

    Who is credited with proposing that matter is composed of tiny, indivisible particles?

    <p>Democritus</p> Signup and view all the answers

    What is the common feature of all atoms of a given element?

    <p>Same atomic number</p> Signup and view all the answers

    What is the significance of the concept of atoms in understanding matter?

    <p>It reveals the fundamental building blocks of matter</p> Signup and view all the answers

    What is the primary contribution of John Dalton's atomic theory?

    <p>It established the idea that elements are composed of small, indivisible particles</p> Signup and view all the answers

    What is the primary reason why electrons are important in determining the chemical properties of an element?

    <p>The arrangement of electrons determines the chemical reactivity and properties of an element</p> Signup and view all the answers

    Which of the following is NOT a characteristic of a pure substance?

    <p>It is a mixture of two or more substances</p> Signup and view all the answers

    What is the main difference between elements and compounds?

    <p>Elements are pure substances that consist of only one kind of atom, while compounds are pure substances made up of two or more different kinds of atoms</p> Signup and view all the answers

    What is the purpose of the electron cloud model?

    <p>To help understand the behavior and interaction of atoms in different chemical reactions</p> Signup and view all the answers

    Which of the following is an example of a decomposition reaction?

    <p>2H2O → 2H2 + O2</p> Signup and view all the answers

    What is the primary function of chemical bonds?

    <p>To hold atoms together in a molecule</p> Signup and view all the answers

    What is the significance of understanding pure substances in chemistry?

    <p>To provide a baseline for studying chemical reactions and properties</p> Signup and view all the answers

    What is the term for a group of two or more atoms bonded together?

    <p>Molecule</p> Signup and view all the answers

    What is the significance of the valence electrons in an element?

    <p>They determine the chemical reactivity and properties of an element</p> Signup and view all the answers

    What is the modern model of the atom often referred to as?

    <p>The electron cloud model</p> Signup and view all the answers

    What is the primary classification of matter that includes elements and compounds?

    <p>Pure Substances</p> Signup and view all the answers

    Which of the following is an example of a homogeneous mixture?

    <p>Seawater</p> Signup and view all the answers

    What is the classification of oxygen gas (O2)?

    <p>Element</p> Signup and view all the answers

    Which of the following is an example of a heterogeneous mixture?

    <p>Rocks</p> Signup and view all the answers

    What is the classification of sugar (C12H22O11)?

    <p>Compound</p> Signup and view all the answers

    Which of the following is a characteristic of a pure substance?

    <p>Uniform composition</p> Signup and view all the answers

    What is the classification of granite?

    <p>Mixture (Heterogeneous)</p> Signup and view all the answers

    Which of the following is an example of a pure substance?

    <p>Gold (Au)</p> Signup and view all the answers

    What is the primary reason for the importance of scientific models in understanding complex concepts?

    <p>They allow us to predict and explain atomic behavior</p> Signup and view all the answers

    What is the significance of the number of protons in the atomic nucleus?

    <p>It determines the identity of an element</p> Signup and view all the answers

    What is the primary function of neutrons in the atomic nucleus?

    <p>To stabilize the nucleus by reducing electrostatic repulsion between protons</p> Signup and view all the answers

    What is the arrangement of electrons in an atom?

    <p>In the electron clouds or shells</p> Signup and view all the answers

    What is the primary difference between elements and compounds?

    <p>Elements are composed of single atoms, while compounds are composed of multiple atoms</p> Signup and view all the answers

    What is the significance of the atomic number in the Periodic Table?

    <p>It determines the position of an element in the Periodic Table</p> Signup and view all the answers

    What is the modern atomic model often referred to as?

    <p>The Nuclear Model</p> Signup and view all the answers

    What is the primary function of electrons in an atom?

    <p>To orbit the nucleus</p> Signup and view all the answers

    What is the difference between isotopes of the same element?

    <p>They have different atomic masses</p> Signup and view all the answers

    What is the significance of the sub-atomic particles in understanding the structure of an atom?

    <p>They help us understand the structure and behavior of atoms</p> Signup and view all the answers

    What is the correct representation of carbon dioxide?

    <p>CO2</p> Signup and view all the answers

    What occurs during the decomposition of water?

    <p>Water molecules are broken down into hydrogen and oxygen atoms</p> Signup and view all the answers

    What is the main difference between a pure substance and a mixture?

    <p>A pure substance has a fixed composition, while a mixture has a variable composition</p> Signup and view all the answers

    What is the result of the decomposition of water?

    <p>Hydrogen gas and oxygen gas are formed</p> Signup and view all the answers

    What is the characteristic of a mixture?

    <p>It has a variable composition</p> Signup and view all the answers

    What is the chemical equation for the decomposition of water?

    <p>2H2O → 2H2 + O2</p> Signup and view all the answers

    What is the correct classification of a substance that consists of two or more kinds of atoms chemically bonded in a fixed ratio?

    <p>Compound</p> Signup and view all the answers

    What is the correct representation of a molecule of oxygen?

    <p>O2</p> Signup and view all the answers

    What is the characteristic of a pure substance?

    <p>It has a fixed composition</p> Signup and view all the answers

    What is the correct classification of a substance that consists of a single kind of atom?

    <p>Element</p> Signup and view all the answers

    What is the primary component of matter that occupies space?

    <p>Atoms</p> Signup and view all the answers

    What is the purpose of the atomic model in understanding matter?

    <p>To understand the structure and composition of matter</p> Signup and view all the answers

    What is a common characteristic of all atoms of a given element?

    <p>Identical masses</p> Signup and view all the answers

    Who reintroduced the concept of atoms to the scientific community in the 19th century?

    <p>John Dalton</p> Signup and view all the answers

    What is the significance of John Dalton's atomic theory in understanding matter?

    <p>It explained the structure and composition of matter</p> Signup and view all the answers

    What is the result of Democritus' idea of atoms being indivisible?

    <p>The acceptance of the concept of atoms in the scientific community</p> Signup and view all the answers

    What is the primary difference between atoms and molecules?

    <p>Atoms are the building blocks of molecules</p> Signup and view all the answers

    Why is it important to understand the concept of atoms in chemistry?

    <p>To understand the structure and composition of matter</p> Signup and view all the answers

    What does a chemical formula represent?

    <p>The type and number of atoms in a molecule</p> Signup and view all the answers

    What occurs in a decomposition reaction?

    <p>A single compound breaks down into two or more simpler substances</p> Signup and view all the answers

    What is the main difference between an element and a compound?

    <p>An element is made up of one type of atom, while a compound is made up of two or more types of atoms</p> Signup and view all the answers

    What is a characteristic of a mixture?

    <p>Retains the properties of its individual components</p> Signup and view all the answers

    What are the two main events that occur in any chemical reaction?

    <p>The formation of new chemical bonds and the breaking of existing chemical bonds</p> Signup and view all the answers

    What is a diatomic molecule?

    <p>A molecule made up of two atoms of the same kind</p> Signup and view all the answers

    What is an example of a mixture?

    <p>Air (a mixture of oxygen, nitrogen, and other gases)</p> Signup and view all the answers

    What can be classified as both an element and a compound?

    <p>Oxygen (O2)</p> Signup and view all the answers

    What is a characteristic of a pure substance?

    <p>Has a fixed composition</p> Signup and view all the answers

    What is the classification of a substance that consists of two or more substances that are physically combined but not chemically bonded?

    <p>Mixture</p> Signup and view all the answers

    What is the classification of sea water?

    <p>Homogeneous mixture</p> Signup and view all the answers

    What type of mixture is rock classified as?

    <p>Heterogeneous mixture</p> Signup and view all the answers

    What is the classification of oxygen gas (O2)?

    <p>Element</p> Signup and view all the answers

    What type of mixture is air classified as?

    <p>Homogeneous mixture</p> Signup and view all the answers

    What is the classification of sugar (C12H22O11)?

    <p>Compound</p> Signup and view all the answers

    What is the classification of milk?

    <p>Heterogeneous mixture</p> Signup and view all the answers

    What type of mixture is steel (alloy of iron and carbon) classified as?

    <p>Homogeneous mixture</p> Signup and view all the answers

    What is the classification of granite?

    <p>Heterogeneous mixture</p> Signup and view all the answers

    What is the main idea behind Dalton's postulates?

    <p>Atoms combine in simple whole-number ratios to form compounds.</p> Signup and view all the answers

    Which of the following is NOT a characteristic of elements?

    <p>Elements can be created or destroyed in chemical reactions.</p> Signup and view all the answers

    What is the role of neutrons in the atomic nucleus?

    <p>They stabilize the nucleus by reducing electrostatic repulsion between protons.</p> Signup and view all the answers

    What is the significance of the atomic number?

    <p>It determines the identity of an element.</p> Signup and view all the answers

    What is the primary function of scientific models?

    <p>To help us understand complex concepts and predict behavior.</p> Signup and view all the answers

    What is the term for particles smaller than an atom?

    <p>Sub-atomic particles</p> Signup and view all the answers

    What is the significance of protons in an atom?

    <p>They determine the identity of an element.</p> Signup and view all the answers

    What is the term for the central part of an atom?

    <p>Atomic nucleus</p> Signup and view all the answers

    What is the role of electrons in an atom?

    <p>They orbit the nucleus in electron clouds.</p> Signup and view all the answers

    What is the significance of the modern atomic model?

    <p>It helps scientists predict and explain atomic behavior.</p> Signup and view all the answers

    What is the primary reason why the arrangement of electrons is significant in an atom?

    <p>It determines the chemical properties and reactivity of an element</p> Signup and view all the answers

    What is the term for the force that holds atoms together in a molecule?

    <p>Chemical Bond</p> Signup and view all the answers

    What is the main difference between elements and compounds?

    <p>Elements are made up of one type of atom, while compounds are made up of two or more different types of atoms</p> Signup and view all the answers

    What is the term for a group of two or more atoms bonded together?

    <p>Molecule</p> Signup and view all the answers

    What is the significance of understanding pure substances in chemistry?

    <p>To understand the behavior and interaction of atoms in different chemical reactions</p> Signup and view all the answers

    What is the result of a decomposition reaction?

    <p>A single compound breaks down into two or more simpler substances</p> Signup and view all the answers

    What is the term for a representation of a substance using symbols for its constituent elements?

    <p>Chemical Formula</p> Signup and view all the answers

    What is the characteristic of a pure substance?

    <p>It is made up of only one type of matter throughout</p> Signup and view all the answers

    What is the term for the process in which substances undergo chemical changes, forming new substances with different properties?

    <p>Chemical Reaction</p> Signup and view all the answers

    What is the term for a substance made up of two or more different kinds of atoms chemically bonded together?

    <p>Compound</p> Signup and view all the answers

    What is the fundamental principle behind the concept of atoms?

    <p>Atoms are the building blocks of matter.</p> Signup and view all the answers

    What is the significance of John Dalton's reintroduction of the concept of atoms?

    <p>It revived the idea that matter is composed of tiny, indivisible particles.</p> Signup and view all the answers

    What is the key characteristic that distinguishes one element from another?

    <p>Atomic number</p> Signup and view all the answers

    What is the primary function of the Periodic Table of Elements?

    <p>To display the elements in order of their atomic number.</p> Signup and view all the answers

    What is the main idea behind John Dalton's postulates?

    <p>That atoms are the building blocks of matter.</p> Signup and view all the answers

    What is the significance of the term 'atomos'?

    <p>It means 'indivisible' or 'not cut'.</p> Signup and view all the answers

    What is the primary characteristic of a chemical element?

    <p>It has a unique atomic number.</p> Signup and view all the answers

    What is the relationship between elements and compounds?

    <p>Compounds are composed of elements.</p> Signup and view all the answers

    What is the primary assumption underlying Dalton's postulates about the nature of matter?

    <p>Atoms of the same element are alike</p> Signup and view all the answers

    Which of the following best describes the modern atomic model?

    <p>A dynamic, planetary model with electrons orbiting the nucleus</p> Signup and view all the answers

    What is the significance of the atomic number in an element?

    <p>It identifies the element and its position in the Periodic Table</p> Signup and view all the answers

    What is the primary function of neutrons in the atomic nucleus?

    <p>To stabilize the nucleus by reducing electrostatic repulsion</p> Signup and view all the answers

    How do electrons behave in their orbits around the nucleus?

    <p>They occupy regions called electron clouds or shells</p> Signup and view all the answers

    What is the primary difference between isotopes of the same element?

    <p>Their atomic masses</p> Signup and view all the answers

    Which of the following statements about protons is true?

    <p>They repel each other in the nucleus</p> Signup and view all the answers

    What is the primary purpose of scientific models?

    <p>To explain complex concepts</p> Signup and view all the answers

    What is the term for the central part of an atom?

    <p>Atomic nucleus</p> Signup and view all the answers

    What is the significance of understanding sub-atomic particles?

    <p>It is essential to understanding the structure and behavior of atoms</p> Signup and view all the answers

    What is the primary reason why electrons determine the chemical properties and reactivity of an element?

    <p>Electrons are involved in chemical bonding.</p> Signup and view all the answers

    What is the key difference between elements and compounds?

    <p>Elements consist of only one kind of atom, while compounds consist of two or more different kinds of atoms.</p> Signup and view all the answers

    What is the significance of understanding pure substances in chemistry?

    <p>It provides a baseline for studying chemical reactions and properties.</p> Signup and view all the answers

    What is the term for the force that holds atoms together in a molecule?

    <p>Chemical bond</p> Signup and view all the answers

    What is the significance of the arrangement of electrons in the outermost shell of an atom?

    <p>It affects the chemical properties and reactivity of an element.</p> Signup and view all the answers

    What is an example of a diatomic molecule?

    <p>Oxygen (O2)</p> Signup and view all the answers

    What is the result when hydrogen and oxygen combine to form water?

    <p>A liquid is formed.</p> Signup and view all the answers

    What is the key characteristic of a pure substance?

    <p>It consists of only one type of matter throughout.</p> Signup and view all the answers

    What is the term for a group of two or more atoms bonded together?

    <p>Molecule</p> Signup and view all the answers

    What is the purpose of the modern atomic model?

    <p>To explain the behavior of atoms in chemical reactions.</p> Signup and view all the answers

    What is the primary difference between a chemical formula and a chemical equation?

    <p>A chemical formula represents a molecule, while a chemical equation represents a reaction.</p> Signup and view all the answers

    What is the term for the process in which a single compound breaks down into two or more simpler substances?

    <p>Decomposition reaction</p> Signup and view all the answers

    What is the primary difference between a mixture and a compound?

    <p>A mixture has a variable ratio of components, while a compound has a fixed ratio.</p> Signup and view all the answers

    What is the term for a combination of two or more substances that are not chemically bonded?

    <p>Mixture</p> Signup and view all the answers

    What is the term for the process in which new bonds are formed between different atoms, resulting in new substances?

    <p>Formation of new chemical bonds</p> Signup and view all the answers

    What is the primary difference between an element and a compound?

    <p>An element is a single type of atom, while a compound is a combination of two or more different atoms.</p> Signup and view all the answers

    What is the term for a diagram that represents the types and numbers of atoms in a molecule?

    <p>Chemical formula</p> Signup and view all the answers

    What is the primary difference between a pure substance and a mixture?

    <p>A pure substance is composed of a single type of matter, while a mixture is composed of multiple types of matter.</p> Signup and view all the answers

    What is the term for the process in which existing bonds between atoms are broken?

    <p>Breaking of chemical bonds</p> Signup and view all the answers

    What is the primary difference between a diatomic molecule and a polyatomic molecule?

    <p>A diatomic molecule is composed of two atoms, while a polyatomic molecule is composed of three or more atoms.</p> Signup and view all the answers

    Which of the following is a characteristic of a heterogeneous mixture?

    <p>The compositions vary from one sample to another.</p> Signup and view all the answers

    What is the main difference between a pure substance and a mixture?

    <p>The uniformity of composition.</p> Signup and view all the answers

    Which of the following is an example of a homogeneous mixture?

    <p>Air</p> Signup and view all the answers

    What is the classification of oxygen gas (O2)?

    <p>Element</p> Signup and view all the answers

    Which of the following is a characteristic of a compound?

    <p>The components are always in a fixed ratio.</p> Signup and view all the answers

    What is the classification of sugar (C12H22O11)?

    <p>Compound</p> Signup and view all the answers

    Which of the following is an example of a heterogeneous mixture?

    <p>Rocks</p> Signup and view all the answers

    What is the classification of steel (alloy of iron and carbon)?

    <p>Mixture (homogeneous)</p> Signup and view all the answers

    What is the primary classification of matter that includes elements and compounds?

    <p>Pure substance</p> Signup and view all the answers

    What is the classification of a mixture that has a uniform composition throughout?

    <p>Homogeneous mixture</p> Signup and view all the answers

    What is the classification of a mixture that has a non-uniform composition?

    <p>Heterogeneous mixture</p> Signup and view all the answers

    Which of the following is an example of a homogeneous mixture?

    <p>Sea water</p> Signup and view all the answers

    What is the classification of gold (Au)?

    <p>Element</p> Signup and view all the answers

    Which of the following is an example of a heterogeneous mixture?

    <p>Rock</p> Signup and view all the answers

    What is the classification of oxygen gas (O2)?

    <p>Element</p> Signup and view all the answers

    What is the classification of carbon dioxide (CO2)?

    <p>Compound</p> Signup and view all the answers

    What is the classification of steel (alloy of iron and carbon)?

    <p>Mixture</p> Signup and view all the answers

    Which of the following is an example of a compound?

    <p>Sugar</p> Signup and view all the answers

    What is the main characteristic of a pure substance?

    <p>It has a fixed composition and properties</p> Signup and view all the answers

    What type of mixture is saltwater?

    <p>Homogeneous mixture</p> Signup and view all the answers

    What is the classification of oxygen gas (O2)?

    <p>Element</p> Signup and view all the answers

    What is the main difference between a pure substance and a mixture?

    <p>The composition and properties</p> Signup and view all the answers

    What is the classification of granite?

    <p>Heterogeneous mixture</p> Signup and view all the answers

    What is the classification of sugar (C12H22O11)?

    <p>Compound</p> Signup and view all the answers

    What is the classification of milk?

    <p>Heterogeneous mixture</p> Signup and view all the answers

    What is the classification of steel (alloy of iron and carbon)?

    <p>Homogeneous mixture</p> Signup and view all the answers

    What type of mixture is air?

    <p>Homogeneous mixture</p> Signup and view all the answers

    What is the classification of gold (Au)?

    <p>Element</p> Signup and view all the answers

    Which of the following is a characteristic of a pure substance?

    <p>It has a fixed composition</p> Signup and view all the answers

    What is the classification of oxygen gas (O2)?

    <p>Pure substance (element)</p> Signup and view all the answers

    What type of mixture is sea water classified as?

    <p>Homogeneous mixture</p> Signup and view all the answers

    What is the classification of granite?

    <p>Mixture (heterogeneous)</p> Signup and view all the answers

    What is the main difference between a pure substance and a mixture?

    <p>Their composition</p> Signup and view all the answers

    What is the classification of carbon dioxide (CO2)?

    <p>Pure substance (compound)</p> Signup and view all the answers

    What type of mixture is milk classified as?

    <p>Heterogeneous mixture</p> Signup and view all the answers

    What is the classification of sugar (C12H22O11)?

    <p>Pure substance (compound)</p> Signup and view all the answers

    What is the classification of steel (alloy of iron and carbon)?

    <p>Mixture (homogeneous)</p> Signup and view all the answers

    What is the classification of gold (Au)?

    <p>Pure substance (element)</p> Signup and view all the answers

    Which of the following is a pure substance?

    <p>Gold (Au)</p> Signup and view all the answers

    What type of mixture is air?

    <p>Homogeneous mixture</p> Signup and view all the answers

    What is the classification of saltwater?

    <p>Homogeneous mixture</p> Signup and view all the answers

    What type of mixture is milk?

    <p>Heterogeneous mixture</p> Signup and view all the answers

    What is the classification of nitrogen gas (N2)?

    <p>Element</p> Signup and view all the answers

    How can mixtures be classified?

    <p>As homogeneous or heterogeneous</p> Signup and view all the answers

    What is the classification of sugar (C12H22O11)?

    <p>Compound</p> Signup and view all the answers

    What is the classification of steel (alloy of iron and carbon)?

    <p>Homogeneous mixture</p> Signup and view all the answers

    Which of the following is an example of a heterogeneous mixture?

    <p>Granite</p> Signup and view all the answers

    What is the main difference between a pure substance and a mixture?

    <p>The uniformity of composition</p> Signup and view all the answers

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