1.

Hydrogen is placed above the alkali metals in both Modern periodic table and Mendeleev's periodic table, but why it is considered as a demerit only in Mendeleev's periodic table and not in Modern periodic table?

Answer» Hydrogen is placed above the alkali metals in both Modern periodic table and Mendeleev's periodic table, but why it is considered as a demerit only in Mendeleev's periodic table and not in Modern periodic table?


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