Atomic Structure Review

Front

What is an electron?

Back

A subatomic particle with a negative charge that orbits the nucleus of an atom.

Front

What are the three main subatomic particles that make up an atom?

Back

Protons, Neutrons, and Electrons.

Front

Where is most of the mass of an atom located?

Back

In the nucleus, which contains protons and neutrons.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of a neutron?

Back

Neutral (no charge).

Front

What is the charge of an electron?

Back

Negative.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

How do you determine the number of neutrons in an atom?

Back

Subtract the number of protons from the mass number.

Front

What is an isotope?

Back

Atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom, which determines the element's identity.