ATOMS and PERIODIC TABLE

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?

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 does the atomic number represent?

Back

The number of protons in an atom.

Front

What does the mass number represent?

Back

The total number of protons and neutrons in an atom.

Front

What is the nucleus of an atom?

Back

The central part of an atom that contains protons and neutrons.