ELEMENTS, COMPOUNDS & MIXTURES

=='''Pure Substances''':== ===A pure substance consists of particles or molecules that are all the same. There are two different types:=== ==='''Elements''':=== Pure substances made out of only one type of atom. [image:http://i.imgur.com/Axg1DwX.png?1] ==='''Compounds''':=== Pure substances made of two or more different types of atoms joined together by an electrical force called a chemical bond. [image:http://i.imgur.com/k29QC2X.png?1] ==Mixtures== Any substance made up of different molecules. The air we breathe is a mixture of nitrogen (78%), oxygen (20%), carbon dioxide and other gasses (2%) [image:http://i.imgur.com/H4BpOUK.png]