What group Hydrogen belongs in Periodic table?

Position of an element in periodic table depends upon its electronic configuration and properties. Hydrogen resembles the elements of Group 1 (IA), 16 (IVA) and 17 (VIIA) in some respects. Properties of hydrogen do not completely match any one of the above-mentioned groups. That is why position of hydrogen is still undecided.

Based on electronic configuration, hydrogen is normally place at the top of the Group 1 (Group IA) elements in the Periodic Table. However, Group 1 (Group IA) elements are from lithium downwards but not hydrogen. One of the best ways is to put hydrogen in a one-member group - Hydrogen Group.

Some properties of hydrogen are like alkali metals.
Some properties of hydrogen are like halogens.
Some properties of hydrogen are different from both of these.

So, some scientists place hydrogen with alkali metals (group 1), some place it with halogens (group 17) and some place it separately in the middle.

Hope this helps.
Thanks for reading.
Cheers!

the alkali metals group

Properties of Hydrogen. Hydrogen is a nonmetal and is placed above group in the periodic table because it has ns1 electron configuration like the alkali metals.

Hydrogen is in the first group just because it has only one electron in the 1s orbital, but it does not show any metallic behavior. It's a diatomic molecule like halogens and also it has an electron missing to reach the noble gas electric configuration. So it's very hard to find a place in the periodic table for hydrogen but it has been put above the alkali metals because it has the same configuration.