Question

what are the valency of Sodium and oxygen​

Answer 1

Valency is the number of electrons in the outermost shell of the atom, that can be lose or gained in order to make the atom a stable one. ... So, valency of Sodium is +1. Configuration of Oxygen (O) is 1s2 2s2 2p4. So, there are 6 electrons in the outer most shell.

Answer 2

Answer:

Element Atomic Number Valency

Valency of Oxygen 8 2

Valency of Fluorine 9 1

Valency of Neon 10 0

Valency of Sodium (Na) 11 1