Periodic Table
Important experiment, people, and Theories
Johann Wolfgang Döbereiner
1 Devise a method to group elements into three elements of similar chemical properties.
2 Of the three elements (ex. Li, Na, K), the element is close to the mean of both elements.
Dmitri Mendeleev
1 Arrange the Atoms according to the atomic weight
2 The modern periodic table is arranged according to the increase in atomic number.
Henry Moseley
He found out through X-ray tests that the chemical property of an element depends on the atomic number of the element rather than on the atomic weight.
John Newlands
1 He found that if you arrange elements according to atomic mess, elements that have similar properties appear every eight times.
2 Law of Octaves
Chmistry in a nutshell
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Chemistry in a nutshell