Parts of an Atom

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What are the three main subatomic particles of an atom?

Back

Protons, neutrons, and electrons.

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

Where are protons and neutrons located in an atom?

Back

In the atomic nucleus.

Front

Where are electrons located in an atom?

Back

In the electron cloud surrounding the nucleus.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is an ion?

Back

An atom that has gained or lost one or more electrons, resulting in a net charge.

Front

What is an isotope?

Back

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