Give reasons
has valency
Magnesium
two
a

Magnesium has valency equal to 2 +

Explanation:

because the electronic configuration of Mg is [2,8,2]. The nearest noble gas to magnesium is neon with electronic configuration of [2,8], to achieve this stable electronic configuration Mg can lose 2 valence electrons, hence its valency is 2 + .

answer; economic order quantity;