Question

Element A has atomic number 11. The formula of its ion will be :

• A. A⁺
• B. A²⁺
• C. A^-
• D. A^2-

Answer 1

The correct option is A

A⁺

Atomic number = 11. Electronic configuration is: 2,8,1.

Valency is 1 so, it will lose one electron to become $A^{+}$.