The Atom

Front

What is in the nucleus of an atom?

Back

Neutrons and protons.

Front

What is the mass number of an atom with 5 protons and 7 neutrons?

Back

12.

Front

What carries no charge in an atom?

Back

Neutrons.

Front

How many protons are in one atom of Lithium?

Back

3.

Front

If an atom has an atomic number of 15 and a mass number of 31, how many protons are there?

Back

15.

Front

What are the three main subatomic particles of an atom?

Back

Protons, neutrons, and electrons.

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.

Front

What determines the atomic number of an element?

Back

The number of protons in the nucleus.