Question

Why hydrogen is present below the first in 7 group of periodic table?

Answer 1

Because hydrogen is non metals elements

Answer 2

Because hydrogen is a nonmetal and forms H- (hydride anions), it is sometimes placed above the halogens in the periodic table. Hydrogen also forms H2 dihydrogen like halogens. ... Hydrogen has a much smaller electron affinity than the halogens. Hydrogen is less electronegative than the halogens