Question

the element X in the group 17 has 3shells if so what will be the chemical formula of compound formed if the element X reacts with Y of the third period which contains one electron in the p subshell​

Answer 1

Answer:

YX3

Explanation:

As the element X is in 17th group it has 7 valence electrons or it can be said it has 3p5 in the last , valency will be 1. And as the element Y has 1 electron in p subshell, it is of the group 13 valency will be 3. therefore compound formed will be YX3

Answer 2

Answer:

XY

Explanation:

For X :

Since X belongs to grp 17 so it means that it has 7 valence electrons . And it has 3 shells which means that it belongs to period 3 . Therefore , the atomic configuration of X is (2,8,7)  . therefore the valency of X is -1 as it gains one electron to gain stability .

For Y :

Since Y belongs to period 3 and contain 1 valence electron it means that it's atomic configuration is (2,8,1 ) . Therefore the valency of y is +1 as it loses 1 electron for stability .

So now,

              Y            X

            +1              -1

Therefore , the formula of compound will be XY .

Have a nice day :) .