Anything that takes up space and has mass. All matter is made of atoms.

The smallest unit of a chemical element.

Each element is made of only one kind of atom.
There are 120 elements.

A list of all the elements that organize the elements

2 or more atoms joined together.
Formed when 2 atoms join together

A substance made up of atoms of 2 or more different elements joined joined by chemical bonds

Tells you the ratio of elements in the compound

Number in front of a variable