Question

7. An element y shows
two valencies of 3 and 5. Work out the formula of its two oxides.​

Answer 1

Answer:

Explanation:

Let the element be “X”

Case 1:

Valency of X= +3

Valency of Oxide “O”= -2

Therefore, the formula for the oxides of the element X= X2O3

Case 2:

Valency of X= +5

Valency of O= -2

Therefore, the formula for the oxides of the element X= X2O5

Answer 2

For valency 3

Oxide is Y2O3

For valency 5

Oxide is Y2O5