Chemistry Review

Front

What is the difference between a compound molecule and an elemental molecule?

Back

A compound molecule is made up of two or more different elements bonded together (e.g., CO2), while an elemental molecule consists of only one type of element (e.g., N2).

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

Tags

NGSS.MS-PS1-1

Front

What is an electron?

Back

An electron is a negatively charged subatomic particle found in atoms.

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NGSS.MS-PS1-5

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Front

What is a pure substance?

Back

A pure substance is made of only one type of matter, while a mixture contains two or more types of matter.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded and can be physically separated.

Front

What is the statement that is NOT true about pure substances and mixtures?

Back

Compounds, such as H2O, are examples of mixtures.

Front

What does the particle diagram represent in a chemical change?

Back

A particle diagram visually represents the arrangement and interaction of particles during a chemical change.

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NGSS.MS-PS1-1

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NGSS.MS-PS1-5

Front

What is the significance of chemical reactions in forming pure substances?

Back

Chemical reactions can create pure substances by combining elements in specific ratios.

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NGSS.MS-PS1-5

Front

What is the role of atoms in forming molecules?

Back

Atoms bond together to form molecules, which can be either elemental or compound molecules.

Tags

NGSS.MS-PS1-1

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance without changing its chemical composition, while a chemical change results in the formation of new substances.

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NGSS.MS-PS1-2

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