He was a teacher at a variety of schools throughout his life. John Dalton is an English chemist who lived from 1766 -1844. This occurs because each molecule of the same type, has the same number of each type of atom. This means that they are different elements.Īlso, whether there are 2 molecules of CO or 548 molecules of CO, the ratio will always come out to be the same as for 1 molecule of CO. Results in a mass ratio of 12:32 or 3:8.Įven though the same two elements are combined, they combine in different ratios. Therefore, a mass ratio of 12:16 or 3:4.ĬO 2 has 12g carbon per 32g oxygen. The mass ratios will be whole-number ratios of each other.ĬO has 12 g carbon per 16 g oxygen. The law of multiple proportions says that atoms or elements can combine to form various chemical compounds. John Dalton’s theory would not label these two structures accurately.
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