Question

If the valency of oxygen is 2, derive the valencies of the other elements present in the following oxides: Sodium oxide (Na2O),Zinc oxide(ZnO),Lead oxide(PbO),Aluminum oxide(Al2O3)and Calcium oxide(CaO), Barium oxide, Copper(II) oxide.

Answer 1

Steps:

1) Valency of oxygen is 2 .

We know valency of one element is equally distributed to identical atoms.

a) Na2O.:

Valency of 2 Na,Sodium = Valency of O

=>2 * Valency of Na, Sodium = 2

=> Valency of Na= 1

b) Zinc Oxide (ZnO) :

Valency of Zn, Zinc = Valency of O

=> Valency of Zn = 2

c) Lead Oxide (PbO) :

Valency of Pb = Valency of O

=> Valency of Pb (Lead) = 2

d) Aluminium Oxide (Al2O3) :

Valency of 2 Al = Valency of 3 O

=>2 * Valency of Al = 3*2

=> Valency of Al = 3

e) Calcium Oxide (CaO) :

Valency of Ca = Valency of O

=> Valency of Ca = 2

Answer 2

Answer:

This guy literally copied.

Explanation:

Do not mark him as brainliest