Question

Find the valency of
a) Na in NaCl
b) C in CO2​

Answer 1

Explanation:

• The valency of sodium (Na) in sodium chloride (NaCl) is 1 because 1 atom of Na combines with 1 atom of Cl. Valence electron also determines the valency of an element.

• Image result for Find the valency of C in CO2​

CO2 is carbon dioxide which has carbon and oxygen in 1:2 ratio. In the electron dot structure of the elements carbon shares two pairs of its electrons with oxygen.  Carbon requires only 4 electrons to become stable, and oxygen needs 2 electrons. So, the valency of carbon in CO2 is 4.18

Answer 2

Answer:

Valency of

a) Na(Sodium) in NaCl is +1

b)C(Carbon) in CO2 is +2