Question

Why Hydrogen is placed with metals in Modern periodic table?

Answer 1

Hydrogen have both characteristics of metals and non- metals .Has it have only one electron and valency also... so it placed in that position..
Also it's a limitations of modern periodic table that it doesn't give exact place of hydrogen..
Hope it will help you..

Answer 2

Hydrogen is placed above group in the periodic table because it has ns1 electron configuration like the alkali metals. However, it varies greatly from the alkali metals as it forms cations (H+) more reluctantly than the other alkali metals.