s are indiscrutable, which means that in chemical reactions the atoms rearrange but they never break apart. Third- atoms of an element are identical. Fourth- Atom of different elements are different. Fifth-Say's compounds are combinations of the smallest whole ratios. He postulated that al atoms from a given element weight the same. He also postulated that all chemical compounds are made up of elements in well defined proportions.Dalton once separated water into two gases, hydrogen and oxygen. He notice that the oxygen gas created was eight times heavier than the hydrogen gas . Hydrogen was known to be the lightest gas of all. The Law of Multiple Proportion was apparently developed by Dalton himself around 1804. The law of multiple proportions states that when two elements are observed to form more than one compound between them, the mass ratios in one compound will be related to the mass ratios in the other, in the proportions of the whole numbers, that means that if for example you have CO and CO2 the oxygen to carbon ratios are 16:12 and 32:12. That means that the second ration is exactly twice as the first because they are exactly twice as many oxygen's in CO2 per carbon as there are in CO. The way he did this is by decomposing. The ratios were determine by synthesizing compound from pure elements. For example when a measured amount of hydrogen was burned in excess oxygen an exact amount of water always evolved. The result of the water product was weighted, and since the hydrogen used was known, the oxygen used was determined assuming conservation of mass. In this way it was found that water contains 11.19% hydrogen and 88.81% oxygen by mass. Since it was the lightest element known, and assumed to be a fundamental value, Dalton assumed by research that hydrogen should have an atomic mass of one. In 1830 Dalton because one of the eight foreign associates of the French Academy of Sciences. And one July 27,1894 John Dalton died of ...
