the formula of oxides of two elements X and Y are XO and Y two O three respectively. find the valencies of X andY? identify the in which they would be placed in the modern periodic table
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X has 1 valency and Y has 3 valency.
X will belong to group 1 and Y to 13th group.
X will belong to group 1 and Y to 13th group.
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6
Given:
The formula of element X is XO.
As the valency of O is 2.
By Criss cross method valence of X will be 2.
The formula of element Y is Y2O3
As the Valency of element Y is 3 by Criss cross method.
So element x Valency is 2.
Valency of element Y is 3.
Hence element X can be placed in second group ( Alkali Earth metals)
Element Y can be placed in 13 group ( Boron Family)
The formula of element X is XO.
As the valency of O is 2.
By Criss cross method valence of X will be 2.
The formula of element Y is Y2O3
As the Valency of element Y is 3 by Criss cross method.
So element x Valency is 2.
Valency of element Y is 3.
Hence element X can be placed in second group ( Alkali Earth metals)
Element Y can be placed in 13 group ( Boron Family)
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