Question

In all its properties, hydrogen resembles:

• A. alkali metals only
• B. halogens only
• C. both alkali metals and halogens
• D. neither alkali metals nor halogens

Answer 1

Answer: (C)

both alkali metals and halogens

Hydrogen resembles alkali metals and halogens in all its properties. The electronic configuration of hydrogen, alkali metals and halogens are $1s^1,n{s}^1$ and $n{s}^2,n{p}^3$ respectively. All are short by one electron from noble gas configuration. Hence, all have similar chemical properties.