Question

Q.3) The electronic configuration of an element X is 2.8.2
a) Find the number of element present in the atom of
element X.
b)Write its atomic number. c) element Xis metal or non-metal?
d)find out the valency of the element X​

Answer 1

Explanation:

Magnesium is the element

(b) It's atomic number is 12.

(c) Magnesium is a metal.

(d) 2+ is the valency of magnesium