Question

Answer the following questions regarding element X whose atomic number is 15:
a) What is its electronic configuration?
b) To which group does it belong?
c) To which period does it belong?
d) What is its valency?
e) Is it a metal or a non metal?
f) What is the formula of its compound with
sodium?

Answer 1

Answer:

2,8,5- electronic configuration

belongs to 15th group

period 3

valency is 3

it is non metal

sodium phosphide is formed Na3P

Answer 2

Answer:

(a) E.C.:1s² 2s² 2p^6 3s² 3p³.

(b) It belongs to the Group 15.

(c) It belongs to the Period 3.

(d) The valency is 3.

(e) It is a non-metal.

(f) The formula of its Compound with Sodium is Sodium Phosphide(Na3P).