Question

Write the similarities between a) hydrogen and halogen b) hydrogen and alkali metal

Answer 1

a) hydrogen can gain an electron to attain duplet like helium atom. This property of accepting is similar to that of halogens. b) Or hydrogen can form a cation by giving an electron to an anion just like an alkali or alkaline earth metal.

Answer 2

Answer:

hydrogen have +1 valency

alkali metal also have+1 valency