Atoms and Elements Assessment

Front

What is the atomic number of an element?

Back

The atomic number of an element is the number of protons in the nucleus of an atom of that element.

Front

How many protons does an atom of Oxygen have?

Back

8

Front

What subatomic particle has a negative charge?

Back

Electron

Front

How many protons does a Calcium atom have?

Back

20

Front

What is the center of an atom called?

Back

Nucleus

Front

What is the charge of a proton?

Back

Positive charge.

Front

What is the charge of a neutron?

Back

No charge (neutral).

Front

What is the charge of an electron?

Back

Negative charge.

Front

What are the three main subatomic particles?

Back

Protons, neutrons, and electrons.

Front

What is the mass of a proton compared to an electron?

Back

A proton is much heavier than an electron.