Atoms and Matter

Front

What is an atom?

Back

The smallest unit of matter that retains the properties of an element.

Front

What are the three main subatomic particles?

Back

Protons, neutrons, and electrons.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of a neutron?

Back

Neutral.

Front

What is the charge of an electron?

Back

Negative.

Front

Where are protons located in an atom?

Back

In the 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

How do you find the atomic mass of an element?

Back

By adding the number of protons and neutrons.

Front

What is the nucleus of an atom?

Back

The central region of an atom containing protons and neutrons.