Question

The electron affinity values of elements A,B,C and D are -135,-60,-200 and -348 KJ/mol respectively. The outer electronic configuration of element B is 1) 3s2 3p5 2) 3s2 3p4 3) 3s2 3p3 4) 3s2 3p2​

Answer 1

Answer:

xy2

Explanation:

Correct option is

XY

2

Valency of element X is 2 (2 electrons in the outermost shell) while that of element Y is 1 (1 electron required in the outer most shell to complete octet) So the formula of the compound between X and Y is XY

2

.