Atoms and Elements

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 parts of an atom?

Back

Protons, neutrons, and electrons.

Front

What charge does a proton have?

Back

A proton has a positive charge.

Front

What charge does an electron have?

Back

An electron has a negative charge.

Front

What charge does a neutron have?

Back

A neutron has no charge.

Front

What is the nucleus of an atom?

Back

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

Front

What determines the atomic number of an element?

Back

The atomic number is determined by the number of protons in the nucleus.

Front

What is atomic mass?

Back

Atomic mass is the weighted average mass of an element's isotopes.

Front

How many electrons does a neutral atom have?

Back

A neutral atom has the same number of electrons as protons.

Front

What is an element?

Back

An element is a pure substance made of only one type of atom.