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Front

What is a gas?

Back

A gas has fast-moving particles.

Front

What does the conservation of mass in a chemical reaction imply?

Back

Atoms are rearranged, not created or destroyed.

Front

What is the atomic number of an element with 6 protons?

Back

6

Front

What are all elements composed of?

Back

Atoms.

Front

What is an example of a chemical change?

Back

Iron rusting.

Front

What is the definition of an atom?

Back

The smallest unit of an element that retains the properties of that element.

Front

What is a chemical reaction?

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

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

Back

A physical change does not alter the chemical composition, while a chemical change does.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.

Front

What is a compound?

Back

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