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  Karl Willhelm, he was bron on December 9,1742 (Germany) at 19 Nov 1774 he discovered Chlorine. And he also elements. And he died on may 21,1786 43 years old.
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  Berzelius, He was a Swedish chemist and he discovered Silicon.
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  On December 1. 1743 Martin Heinrich Klaproth was born he was a German chemist. And he discover Uranium. and he died on 1817 on January.
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  On December 1. 1743 Martin Heinrich Klaproth was born he was a German chemist. And he discover Cerium. and he died on 1817 on January.
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  William Gregor was the british bron on december 25 1761. he discovered the elemental Metal Titanium. and he died on June 11,1817.
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  Sir Humphry Davy was born on December 17,1778 and he was a british chemist. He discovered calcium by electroly zing lime in mercury he even tried some of it himself.
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  Jons Jacob Berzelius was bron August 20,1779. He discovers the element of selenium. He died on August 7, 1848
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  Aluminum first made
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  On 19 Nov 1843 Carl Gustaf Mosander discovered Erbium.
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  On 19 Nov 1878, Marc Delafontaine and Jacques - louis soret discovered Holmium.
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  On 19 Nov 1894 William Ramsay and Morris Travers discovered neon.
 
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