Question

Why does hydrogen resemble both group 1 and group 17 elements?

Answer 1

• Hydrogen has one electron in its valence shell it can both lose and give an electron to achieve stability.
• Hydrogen has an electronic configuration$1{\mathrm{S}}^1$. It can accept the electron from metals to fulfill its outer orbital like group 17 elements.
• On the other hand, it can donate its electron to form an H+ ion which is the characteristic of the group 1 element.

Thus, on account of its electronic configuration and properties, it resembles group 1 and group 17 elements.