Atoms of different elements have different masses. Atoms of different elements combine in small, whole-number ratios to form compounds. For example, hydrogen and oxygen atoms combine in a ratio of 2:1 to form the compound water, H2O.
•Atoms of different elements have different masses. Atoms of different elements combine in small, whole-number ratios to form compounds. For example, hydrogen and oxygen atoms combine in a ratio of 2:1 to form the compound water, H2O.
