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The first discovered was phosphor and was discovered by Hennig brand
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He invented the Philosoper stone witch is a metal that turns into pure gold
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He thought he discovered phosphors without knowing about Hennig brand discovery
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47 elements discovered and named and the scientist began to see protons in their atoms
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Notice that the atomic weight of strontium fell midway between the weights of calcium & boron, elements possessing similar chemical properties
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Was the 1st person to make use of the atomic weights to reveal that they were arranged by that atomic weights
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Organized the 56 then known elements into eleven separated groups based upon their atomic structure
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Russian chemist Dimitir Mendeleer started the development of the period table, arranging chemical elements by atomic mass
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63 elements have been discovered
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Reported the discovery of a new gaseous element named Aragon witch provided table chemically inert