1.

Looking at its resemblance to alkali metals and the halogen family, try to assign hydrogen a correct position in Mendeleev's Periodic Table. To which group and period should hydrogen be assigned?

Answer»

Solution :Hydrogen can be PLACED in both alkali metals eand halogen GROUP and period can.t DECIDED PROPERLY. This is in FACT, one of the limitations of Mendeleev.s Periodic Table.


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