Front

What is the basic unit of matter?

Back

An atom.

Front

What are the three main subatomic particles?

Back

Electrons, protons, and neutrons.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the charge of a neutron?

Back

Neutral (0).

Front

Where are protons and neutrons located in an atom?

Back

In the nucleus.

Front

What is the electron cloud?

Back

The region around the nucleus where electrons are likely to be found.

Front

How do you find the number of neutrons in an atom?

Back

Subtract the atomic number from the atomic mass.

Front

What is the atomic number?

Back

The number of protons in an atom.

Front

What is the atomic mass?

Back

The total number of protons and neutrons in an atom.