64 Questions
What are the two main categories of matter?
Pure substances and mixtures
What is an example of a heterogeneous mixture?
Rocks
What is the classification of sugar (C12H22O11)?
Pure substance (compound)
What is the classification of oxygen gas (O2)?
Pure substance (element)
What is the classification of milk?
Mixture (heterogeneous)
What is the classification of steel (alloy of iron and carbon)?
Mixture (homogeneous)
What is a mixture?
A combination of two or more substances that are not chemically bonded and retain their individual properties
What is the main difference between pure substances and mixtures?
Pure substances are composed of only one type of matter, while mixtures are composed of multiple substances
What is an example of a homogeneous mixture?
Sea water
What is an example of a diatomic molecule?
Oxygen (O2)
What is the classification of air?
Mixture (homogeneous)
What do diagrams (a) and (b) represent?
Elements
What is a characteristic of compounds?
They are made up of two or more kinds of atoms chemically bonded in a fixed ratio
What is a characteristic of mixtures?
They retain their individual properties and can be separated by physical means
What do diagrams (a), (b), and (c) have in common?
They all represent elements or compounds, but not mixtures
Why is it essential to understand the distinction between elements, compounds, and mixtures?
To classify materials correctly
Which of the following is a characteristic of a pure substance?
It has a fixed composition
Which type of mixture has a uniform composition throughout?
Homogeneous mixture
What is the classification of carbon dioxide (CO2)?
Compound
Which of the following is an example of a heterogeneous mixture?
Rocks
What is the classification of water (H2O)?
Compound
Which of the following is a characteristic of compounds?
They have a fixed ratio of atoms
Which of the following is an example of a pure substance that is an element?
Gold (Au)
What is the main difference between elements and compounds?
Elements are composed of one type of atom, while compounds are composed of multiple types of atoms
Which of the following statements about pure substances is true?
Pure substances are composed of only one type of matter throughout.
What is a characteristic of elements?
They are made up of only one kind of atom.
What is a compound?
A pure substance made up of two or more kinds of atoms.
What is a diatomic molecule?
A molecule made up of two atoms of the same kind.
What is a characteristic of mixtures?
Their components retain their individual properties.
What do diagrams (a) and (b) have in common?
They represent elements.
What is the main difference between diagrams (c) and (d)?
One represents a compound and the other represents a mixture.
What is the purpose of understanding the distinction between elements, compounds, and mixtures?
To distinguish between elements, compounds, and mixtures.
What is the primary characteristic of a mixture?
It retains its individual properties.
Which of the following is a characteristic of both elements and compounds?
They are pure substances.
What is the difference between a compound and a mixture?
A compound is composed of chemically bonded atoms, while a mixture is not.
What is represented in diagram (c)?
A compound consisting of molecules made up of two or more different kinds of atoms chemically bonded in a fixed ratio.
What is the main difference between a pure substance and a mixture?
A pure substance is composed of only one type of matter, while a mixture is composed of multiple substances.
What is the purpose of understanding the distinction between elements, compounds, and mixtures?
To classify materials.
Which of the following is an example of a compound?
Water (H2O)
What is the difference between diagrams (a) and (b)?
Diagram (a) represents an element consisting of single atoms, while diagram (b) represents an element consisting of diatomic molecules.
What is the primary difference between a homogeneous and heterogeneous mixture?
The uniformity or non-uniformity of composition throughout
Which of the following is an example of a pure substance that is a compound?
Water (H2O)
Why is it important to classify matter as pure substances or mixtures?
To distinguish between substances with different compositions and properties
What is the classification of nitrogen gas (N2)?
Element
Which of the following is an example of a mixture that is found in nature?
Rocks
What is the classification of granite?
Heterogeneous mixture
What is the purpose of the flowchart for classifying matter?
To help visualize the classification of matter into pure substances and mixtures
What is the common characteristic of all pure substances?
They have a fixed composition and properties
What is the primary reason for distinguishing between pure substances and mixtures?
To classify materials based on their composition
Which of the following statements is true about elements?
They consist of only one type of atom
What is the primary difference between a homogeneous and heterogeneous mixture?
The uniformity or non-uniformity of composition
What is represented in diagram (d)?
A mixture of different substances
What is the main characteristic of a pure substance?
It consists of only one type of matter
What is the purpose of diagrams (a), (b), and (c)?
To illustrate the difference between pure substances and mixtures
What is a characteristic of compounds?
They are made up of two or more kinds of atoms chemically bonded
Why is it essential to understand the distinction between elements, compounds, and mixtures?
To classify materials based on their composition
What is the primary characteristic that distinguishes a pure substance from a mixture?
Composition
Which of the following statements is true about elements and compounds?
Elements and compounds are both pure substances
What is the main difference between a homogeneous and a heterogeneous mixture?
The uniformity of the mixture
Which of the following is an example of a pure substance that is not an element?
Water (H2O)
What is the purpose of classifying matter into pure substances and mixtures?
To understand the properties and behavior of different materials
Which of the following is an example of a heterogeneous mixture found in nature?
Rocks
What is the main advantage of using a flowchart to classify matter?
It provides a step-by-step process for classifying matter
Which of the following is a characteristic of all mixtures?
Variable proportion of components
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