Question

The number of protons in one atom of an element X is 8. What will be the number of electrons in its ion X2−?
(a) 8
(b) 9
(c) 10
(d) 11

Answer 1

Answer:

C

Explanation:

Atomic number 8 is referred to Oxygen. Ion of Oxygen having -2 charge have Octet complete So no of electron will be 10

Answer 2

Answer:

(A) 8

because same number of protons or electrons in an atom