Atoms, Elements, Molecules, Compounds

Front

What is an atom?

Back

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

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

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.

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically bonded.

Front

What are subatomic particles?

Back

Particles that are smaller than atoms, including protons, neutrons, and electrons.

Front

How do you organize atoms, substances, subatomic particles, and compounds from smallest to largest?

Back

Subatomic particles, atoms, compounds, substances.

Front

What is the difference between a molecule and a compound?

Back

All compounds are molecules, but not all molecules are compounds. A compound must contain at least two different elements.

Front

What is H2O?

Back

A compound made of two hydrogen atoms and one oxygen atom.

Front

What defines a substance?

Back

A form of matter that has a uniform and definite composition.