Question

What is the valency of each of the underlined elements in the
following oxides? Take the valency of oxygen to be 2.
(a) Na
(b) Al2O3
(c) SiO2​

Answer 1

Answer:

Na - 1

Al-3

O-2

Si-4

Explanation:

Since Na has only one electron in its outer most shell so the valancy is 1

since Al has 3 electrons in its outer most shell so the valancy is 3

since oxygen requires 2 electrons to complete it's octate structure the valancy is 2

since silicon has 4 electrons in its outer most shell so the valancy is 4