Mendeleev started with how many elements? *
61
62
63
64
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0
Answer:
63 elements
Explanation:
In 1869, Russian chemist Dmitri Mendeleev arranged 63 elements by increasing atomic weight in several columns, noting recurring chemical properties across them. It is sometimes said that he played "chemical solitaire" on long train journeys, using cards with the symbols and the atomic weights of the known elements.
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Answered by
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Answer:
63
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