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The middle ages started with the collapse of the western roman empire and lasted form the 5th century to the 15th century
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The start of alchamey in the middle east
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The middle ages ended with the flouris of the renaissance culture throughout europe.
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The element phosphorus was discovered by H Brand, element symbol H with an atomic number of 15
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This is the long tradition of naming each new element in Greek or Latin words
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The discovery of radioactivity in the late 1800's
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JJ.Thomas came up with the plum pudding model and the atomic structure theory
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Enrico Fermi was an Italian physicist, best known for his work on Chicago Pile-1, and for his contributions to the development of quantum theory, nuclear and particle physics, and statistical mechanics.
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After the bombing of Japan there was discovery of a lot of elements
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In the race to find new atoms the two countries started to argue about which name should be given, English or Russian.
