Front

This subatomic particle has a neutral charge.

Back

Neutron

Front

This subatomic particle has a negative charge.

Back

Electron

Front

This subatomic particle has a positive charge.

Back

Proton

Front

Pure substances made up of only one type of atom.

Back

Elements

Front

An element's atomic number is the same as the number of ____________.

Back

Protons

Front

The center of an atom, containing protons and neutrons.

Back

Nucleus

Front

The region around the nucleus where electrons are likely to be found.

Back

Electron cloud

Front

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

Back

Atom

Front

The positively charged particle found in the nucleus of an atom.

Back

Proton

Front

The negatively charged particle that orbits the nucleus of an atom.

Back

Electron