Question

The ratio of non metal atoms to the number of atoms of non metallic oxides A and B are 0.33 and 0.25 respectively. Find the valencies of non metals present in those metallic oxides​

Answer 1

The valency of non metal is +4 and the valency of non metallic oxide is +8.

Explanation:

Given ratio= 0.33  i.e. 1:3

• So, there is 1 non metal atom out of 3 atoms of the molecule
• Therefore, out of 3 atoms, if 1 is non metal, the other 2 will have to be oxygen atoms, since it's given the compound is an OXIDE
• Finally, we see that, we have 1 non-metal atom for every 2 oxygen atoms

Hence the valency of that 1 non-metal atom must be equal to the total valence of the 2 oxygen atoms (∵ total valence of a compound = 0)

• Let the valency of non-metal be x.

We know the valency of each Oxygen atom = -2

For compound, total valence = x + (2 x (-2)) = 0

x - 4 = 0

x = +4

Hence, valency of the non-metal ion is +4

• For B:

It's the same thing, but with ratio 1:4 (which is equal to 0.25)

so, x + (4 x (-2)) = 0

 x - 8 = 0

x = +8

Hence the valency of non metal is +4 and the valency of non metallic oxide is +8.

Also learn more

Element X is a metal with a valency 2.  Element Y is a non-metal with a valence 3.  write equation to show how X and Y form ions?

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