India Languages, asked by nandangupta160, 4 months ago

ਆਕਸੀਜ਼ਨ ਦੀ ਕਮੀ ਤੇ ਲੇਖ

Answers

Answered by xXCuteBoyXx01

36

Explanation:

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. ... While arranging these cards of atomic data, Mendeleev discovered what is called the Periodic Law.

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