Front

Most of an atom's mass is found in the

Back

nucleus.

Front

The atomic number is equal to _

Back

the number of protons.

Front

How many neutrons does this isotope of lithium have?

Back

5.

Front

The nucleus of an atom contains which subatomic particles?

Back

protons and neutrons.

Front

Which subatomic particle is counted to determine the type of element the atom represents?

Back

proton.

Front

What are the three main subatomic particles of an atom?

Back

Protons, neutrons, and electrons.

Front

What charge do protons carry?

Back

Positive charge.

Front

What charge do electrons carry?

Back

Negative charge.

Front

What is the charge of a neutron?

Back

Neutral (no charge).

Front

What is an ion?

Back

An atom or molecule that has a net electric charge due to the loss or gain of one or more electrons.