Question

How will u ditermine the valancy of magnesium?

Answer 1

Answer:

For magnesium, valency is equal to the number of electrons (two) in valence shell. For oxygen, valency is equal to eight minus the number of electrons present in the outermost shell (8−6=2)

Answer 2

Answer:

first you can take the electronic configuration of magnesium

the electronic configuration of magnesium =2,8,2

In the last shell of an atom the valence electron is 2.

So,the valency is 2

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