Front

What does the atomic number of an element represent?

Back

The atomic number represents the number of protons in an atom.

Front

What subatomic particle determines the identity of an element?

Back

The proton determines the identity of an element.

Front

If an element has an atomic number of 8, how many protons does it have?

Back

It has 8 protons.

Front

What is the mass number of an atom?

Back

The mass number is the sum of protons and neutrons in the nucleus.

Front

How many neutrons does an element with a mass number of 10 and an atomic number of 6 have?

Back

It has 4 neutrons.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (neutral).

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.

Front

What is the atomic mass of an atom?

Back

The atomic mass is the weighted average mass of an element's isotopes.