Parts of an Atom

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus of an atom.

Front

How do you calculate the mass number of an atom?

Back

Mass number = Number of protons + Number of neutrons.

Front

What is the mass number of an oxygen atom with 8 protons and 8 neutrons?

Back

16.

Front

How many electrons does a neutral oxygen atom have?

Back

8 electrons.

Front

What subatomic particle determines the identity of an atom?

Back

Protons determine the identity of an atom.

Front

What is the charge of protons?

Back

Protons have a positive charge.

Front

What is the charge of neutrons?

Back

Neutrons have no charge (they are neutral).

Front

What is the charge of electrons?

Back

Electrons have a negative charge.

Front

Which subatomic particles are found in the nucleus of an atom?

Back

Protons and neutrons are found in the nucleus.

Front

What is the role of electrons in an atom?

Back

Electrons are involved in chemical bonding and reactions.