Question

The outermost electron configuration of an element X is 3s2 3p5 and Y is 2p6 3s2.Write the chemical formula of the compound formed between X and Y

Answer 1

Electronic configuration of X is:

X=1s

2

2s

2

2p

6

3s

2

3p

6

4s

2

has 2 electrons more than stable configuration. So this can be written as X

2+

after removing 2 eletrcons.

Electronic configuration of Y is:

Y=1s

2

2s

2

2p

6

3s

2

3p

5

has 1 electron less than stable configuration. So this can be written as Y

−

after gaining 1 electron

X

2+

+2Y

−

=XY

2

2 ions of element Y combine with 1 ion X to give XY

2

.

The resulting molecule will be stable and will have no net charge.

hope it helps...☺️✌️