1.

Justify the statement" hydrogen occupies a unique position in modern periodic table".

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Welcome Nishtha
Hydrogen element has been placed at the top of group 1 ,above the alkali metal because the electronic configration of hydrogen is similar to those of alkali metal.both,hydrogen as well as alkali metal have 1 valence electron each .some hydrogen atom is very small in size,many properties of hydrogen are different from those alkali metal.
Thank u ??
Hydrogen resembles alkali metals as well as halogens
Beacuse


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