Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element. It consists of protons, neutrons, and electrons.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together. It can be made of the same or different elements.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

Front

What charge does a proton have?

Back

A proton has a positive electric charge.

Front

What charge does an electron have?

Back

An electron has a negative electric charge.

Front

What is the charge of a neutron?

Back

A neutron has no electric charge; it is 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 are located in the electron cloud surrounding the nucleus.

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 size comparison between protons and neutrons?

Back

Protons and neutrons are about the same size.