Question

Match the atomic number 4, 8, 14, 15 and 19 with each of the following: i) A solid non-metal of valency 3 ii) A gas valency 2 iii) A metal valency 4 iv) A nonmetal of valency​

Answer 1

Correct option is

C

14

Atomic no. 14 is silicon with configuration of 2,8,4 so it need four more electron to complete octet and have valency of 4.

Answer 2

Answer:

i)-15(P)

ii)-8(O)

iii)-14(Si)

iv)-