ATOM AND CHEMICAL COMBINATION
Law of Constant Composition
for a given compound, the relative number and kind of atoms are constant.
Law of Conservation of Mass
the total mass of materials present after a chemical reaction is the same as the total mass before the reaction.
Law of Multiple Proportions
if two elements can combine to form more than one compound, the masses of one element that combine with a fixed mass of the second element are in the ratio of small whole numbers.
5