how many elements there in mandaleef at that time
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Explanation:
63 elements
- To put some order into his study of chemical elements, Mendeleev made up a set of cards, one for each of the 63 elements known at the time. Mendeleev wrote the atomic weight and the properties of each element on a card. He took the cards everywhere he went.
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Explanation:
118 elements......
may be...
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