Atomic Theory and Atomic Structure

Front

What is the charge of the nucleus of all atoms or ions?

Back

Positive

Front

What are subatomic particles with a positive charge called?

Back

Protons

Front

What do all atoms of a particular element have in common?

Back

The same number of protons

Front

Where is all of an atom's mass considered to be located?

Back

In the nucleus

Front

How many electrons does a neutral Argon atom have?

Back

18 electrons

Front

What are the three main subatomic particles?

Back

Protons, neutrons, and electrons

Front

What is the mass of a proton compared to a neutron?

Back

Approximately equal, but protons are slightly lighter.

Front

What is the overall charge of an atom?

Back

Neutral, because it has equal numbers of protons and electrons.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the role of neutrons in an atom?

Back

They contribute to the mass of the atom and stabilize the nucleus.