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hydrogen should be in 7a group because the characteristics are more in it. but they are keeping in 1a group.Why?

hydrogen should be in 7a group because the characteristics are more in it. but they are keeping in 1a group.Why?

Grade:10

1 Answers

Pankaj
askIITians Faculty 131 Points
9 years ago
Hello Student
Hydrogen is the first element of periodic table but its position in the periodic table has been a subject of discussion for the past few years due to its similarities with both halogens and alkali metals. A proper position could not be assigned to hydrogen either in the Mendeleev’s periodic table or Modern periodic table because of the following reason: In some properties, it resembles alkali metals and in some properties it resembles halogens. So hydrogen can be placed both in group 1 and group 17 with alkali metals and halogen respectively.

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