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

What is the meaning of the term 'atomos'?

<p>Indivisible (A)</p> Signup and view all the answers

What is a scientific model?

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

What is a postulate?

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

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

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

What is the purpose of scientific models?

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

What is the central part of an atom called?

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

What determines the identity of an element?

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

What is the charge of neutrons?

<p>Neutral (B)</p> Signup and view all the answers

What is the function of electrons in an atom?

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

What is the difference between isotopes of the same element?

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

What is the purpose of the atomic model?

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

What is an element?

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

What is the significance of protons in an atom?

<p>They determine the atomic number. (B)</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 (C)</p> Signup and view all the answers

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

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

What is a pure substance?

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

What is a chemical bond?

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

What is an example of a compound?

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

What is the significance of understanding pure substances in chemistry?

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

What is a molecule?

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

What is an example of a diatomic molecule?

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

What does a chemical formula represent?

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

What occurs in decomposition reactions?

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

What is an example of a diatomic molecule?

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

What is a characteristic of a mixture?

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

How can mixtures be classified?

<p>As pure substances or mixtures (A)</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 (D)</p> Signup and view all the answers

What type of mixture is air classified as?

<p>Homogeneous (C)</p> Signup and view all the answers

What category does gold (Au) fall under?

<p>Element (C)</p> Signup and view all the answers

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

<p>Rocks (D)</p> Signup and view all the answers

What is the classification of sugar (C12H22O11)?

<p>Compound (B)</p> Signup and view all the answers

What type of mixture is milk classified as?

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

What is the classification of nitrogen gas (N2)?

<p>Element (C)</p> Signup and view all the answers

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

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

What type of mixture is granite classified as?

<p>Heterogeneous (D)</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 (C)</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 (A)</p> Signup and view all the answers

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

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

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

<p>Atom (B)</p> Signup and view all the answers

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

<p>Democritus (B)</p> Signup and view all the answers

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

<p>Same atomic number (C)</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 (C)</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 (C)</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 (B)</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 (C)</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 (C)</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 (D)</p> Signup and view all the answers

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

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

What is the primary function of chemical bonds?

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

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

<p>Molecule (D)</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 (C)</p> Signup and view all the answers

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

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

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

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

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

<p>Seawater (B)</p> Signup and view all the answers

What is the classification of oxygen gas (O2)?

<p>Element (B)</p> Signup and view all the answers

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

<p>Rocks (D)</p> Signup and view all the answers

What is the classification of sugar (C12H22O11)?

<p>Compound (D)</p> Signup and view all the answers

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

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

What is the classification of granite?

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

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

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

What is the arrangement of electrons in an atom?

<p>In the electron clouds or shells (D)</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 (A)</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 (D)</p> Signup and view all the answers

What is the modern atomic model often referred to as?

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

What is the primary function of electrons in an atom?

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

What is the difference between isotopes of the same element?

<p>They have different atomic masses (A)</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 (C)</p> Signup and view all the answers

What is the correct representation of carbon dioxide?

<p>CO2 (D)</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 (D)</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 (C)</p> Signup and view all the answers

What is the result of the decomposition of water?

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

What is the characteristic of a mixture?

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

What is the chemical equation for the decomposition of water?

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

What is the correct representation of a molecule of oxygen?

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

What is the characteristic of a pure substance?

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

What is the primary component of matter that occupies space?

<p>Atoms (D)</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 (D)</p> Signup and view all the answers

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

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

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

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

What is the primary difference between atoms and molecules?

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

What does a chemical formula represent?

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

What is a characteristic of a mixture?

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

What is a diatomic molecule?

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

What is an example of a mixture?

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

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

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

What is a characteristic of a pure substance?

<p>Has a fixed composition (D)</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 (B)</p> Signup and view all the answers

What is the classification of sea water?

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

What type of mixture is rock classified as?

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

What is the classification of oxygen gas (O2)?

<p>Element (D)</p> Signup and view all the answers

What type of mixture is air classified as?

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

What is the classification of sugar (C12H22O11)?

<p>Compound (C)</p> Signup and view all the answers

What is the classification of milk?

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

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

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

What is the classification of granite?

<p>Heterogeneous mixture (A)</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. (B)</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. (B)</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. (A)</p> Signup and view all the answers

What is the significance of the atomic number?

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

What is the term for particles smaller than an atom?

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

What is the significance of protons in an atom?

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

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

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

What is the role of electrons in an atom?

<p>They orbit the nucleus in electron clouds. (B)</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. (A)</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 (C)</p> Signup and view all the answers

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

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

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

<p>Molecule (A)</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 (C)</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 (A)</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 (B)</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 (C)</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 (C)</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 (C)</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. (D)</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. (D)</p> Signup and view all the answers

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

<p>Atomic number (D)</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. (D)</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. (A)</p> Signup and view all the answers

What is the significance of the term 'atomos'?

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

What is the primary characteristic of a chemical element?

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

What is the relationship between elements and compounds?

<p>Compounds are composed of elements. (B)</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 (C)</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 (D)</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 (D)</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 (D)</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 (D)</p> Signup and view all the answers

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

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

Which of the following statements about protons is true?

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

What is the primary purpose of scientific models?

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

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

<p>Atomic nucleus (C)</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 (B)</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. (D)</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. (D)</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. (A)</p> Signup and view all the answers

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

<p>Chemical bond (A)</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. (D)</p> Signup and view all the answers

What is an example of a diatomic molecule?

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

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

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

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

<p>Molecule (A)</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. (C)</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. (A)</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 (B)</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. (C)</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 (C)</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 (D)</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. (D)</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 (B)</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. (A)</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 (C)</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. (A)</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. (A)</p> Signup and view all the answers

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

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

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

<p>Air (B)</p> Signup and view all the answers

What is the classification of oxygen gas (O2)?

<p>Element (B)</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. (A)</p> Signup and view all the answers

What is the classification of sugar (C12H22O11)?

<p>Compound (C)</p> Signup and view all the answers

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

<p>Rocks (B)</p> Signup and view all the answers

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

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

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

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

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

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

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

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

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

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

What is the classification of gold (Au)?

<p>Element (C)</p> Signup and view all the answers

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

<p>Rock (C)</p> Signup and view all the answers

What is the classification of oxygen gas (O2)?

<p>Element (C)</p> Signup and view all the answers

What is the classification of carbon dioxide (CO2)?

<p>Compound (B)</p> Signup and view all the answers

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

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

Which of the following is an example of a compound?

<p>Sugar (C)</p> Signup and view all the answers

What is the main characteristic of a pure substance?

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

What type of mixture is saltwater?

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

What is the classification of oxygen gas (O2)?

<p>Element (B)</p> Signup and view all the answers

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

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

What is the classification of granite?

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

What is the classification of sugar (C12H22O11)?

<p>Compound (A)</p> Signup and view all the answers

What is the classification of milk?

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

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

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

What type of mixture is air?

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

What is the classification of gold (Au)?

<p>Element (C)</p> Signup and view all the answers

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

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

What is the classification of oxygen gas (O2)?

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

What type of mixture is sea water classified as?

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

What is the classification of granite?

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

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

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

What is the classification of carbon dioxide (CO2)?

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

What type of mixture is milk classified as?

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

What is the classification of sugar (C12H22O11)?

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

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

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

What is the classification of gold (Au)?

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

Which of the following is a pure substance?

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

What type of mixture is air?

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

What is the classification of saltwater?

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

What type of mixture is milk?

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

What is the classification of nitrogen gas (N2)?

<p>Element (C)</p> Signup and view all the answers

How can mixtures be classified?

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

What is the classification of sugar (C12H22O11)?

<p>Compound (D)</p> Signup and view all the answers

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

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

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

<p>Granite (B)</p> Signup and view all the answers

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

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

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