Question

Noble gases are _______________.

• A. H, P
• B. G, P
• C. G, H
• D. D, P

Answer 1

Answer: (A)

H, P

i) H, P are noble gases as they have electronic configuration $2,8$ and $2,8,8$ respectively.

ii) G, O are halogens as they have electronic configuration $2,7$ and $2,8,7$ and they need one electron to complete their octet.

iii) A, I are alkali metals as they have electronic configuration $2,1$ and $2,8,1$.

iv) D, L have valency 4 as the outermost electrons are four.