Question

The atomic number of magnesium is 12. What is its valency?

• A. 1
• B. 2
• C. 3
• D. 4

Hint:

The valency of an element is the number of electrons it gains, loses, or shares to achieve a stable electron configuration, usually corresponding to the nearest noble gas.

Answer 1

The Correct Option is B

Magnesium has an atomic number of 12, meaning it has 2 electrons in its outermost shell. It loses these 2 electrons to form a stable ion, making its valency 2.