Protons, Neutrons, and Electrons

Front

What is the atomic mass of Sodium?

Back

22.99 (23 rounded)

Front

How many electrons does Sodium have?

Back

11

Front

How many protons does Argon have?

Back

18

Front

What is the atomic mass of Calcium?

Back

40.08 (40 rounded)

Front

How many electrons does Calcium have?

Back

20

Front

What is the charge of a proton?

Back

Positive (+1)

Front

What is the charge of a neutron?

Back

Neutral (0)

Front

What is the charge of an electron?

Back

Negative (-1)

Front

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

Back

They are equal in number.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.