1element, 2compound, 3mixture, 4mixture, 5element, 6compound, 7compound, 8mixture, 9mixture, 10mixture, 11element, 12mixture, 13mixture, 14element, 15mixture, 16mixture, 17compound, 18mixture, 19mixture, 20mixture.
An element is a pure substance that cannot be split up itno two or more simpler substances by chemical processes or by electricity.
A compound is a pure substance that contains two or more elements chemically combined. (sodium chloride-salt)
Mixtures are formed when two substances are added together without chemical bonds being formed.