One particular type of atom and it cannot be broken down into a simpler substance

Unlike an element, a(n) ________ may be separated through a physical process like filtration.

A substance made up of two or more elements that have been chemically combined is called

A substance made of atoms of two or more different elements joined by chemical bonds.

Water, air, and glass are examples of ________.

A substance that cannot be broken down into other substances by ordinary chemical procedures is a(n)