Question

The valency of nitrogen in NH3 is 3. What is the valency of oxygen in H2O?

Answer 1

The valency of Oxygen in H2O is 2.Because the Oxygen atom is sharing two pairs of electrons.

Answer 2

Answer:

Valency of O in H2O….

Explanation:

H2O is a Chemical term used for Water. It is a combination of Two Molecules of Hydrogen and One of Oxygen. Together when these combine via Bond then it forms a Molecule of Water.

Now when look at the Valency of Each Hydrogen and Oxygen in water molecule, it is obvious that to combine together, both need to satisfy the Octet rule. When speaking of Oxygen its Oxidation number in water is negative 2. When speaking of Hydrogen, its Oxidation is Positive 1. So in water, the Valency of Oxygen is 2.