Atom Basics

Front

What is the smallest unit of matter?

Back

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

Front

What are the three main particles in an atom?

Back

Protons, neutrons, and electrons.

Front

What charge do protons have?

Back

Protons have a positive charge.

Front

What charge do electrons have?

Back

Electrons have a negative charge.

Front

What charge do neutrons have?

Back

Neutrons have no charge (they are neutral).

Front

Where are protons located in an atom?

Back

Protons are located in the nucleus of an atom.

Front

Where are electrons located in an atom?

Back

Electrons move around the nucleus in electron shells.

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the atomic mass?

Back

The atomic mass is the average mass of an atom, taking into account the number of protons and neutrons.