Atoms & Molecules Review

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What are the three main parts of an atom?

Back

The three main parts of an atom are protons, neutrons, and electrons.

Front

What charge do protons have?

Back

Protons have a positive electric charge.

Front

What charge do neutrons have?

Back

Neutrons have no electric charge (they are neutral).

Front

What charge do electrons have?

Back

Electrons have a negative electric charge.

Front

Where are protons and neutrons located in an atom?

Back

Protons and neutrons are located in the nucleus of an atom.

Front

Where are electrons located in an atom?

Back

Electrons are located in the electron cloud surrounding the nucleus.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical reactions.

Front

What is a compound?

Back

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