Question

Valency of
a) Magnanese in MnO2
​

Answer 1

Answer:

valency of magnesium = 2

valency of oxygen = 4

(with the help of chemical making

formula )

2( valency of magnesium ) divides the 4( valency of oxygen )

now magnesium is balanced .

Answer 2

it is your answer.

I think it's write.