An element X with electronic configuration \(1S^22S^22P^63S^2\) combines with another element Y with the configuration \(1S^2S^22P^23S^23P^5\). What is the formula of the compound formed?
- X2Y5
- X2Y3
- XY3
-
XY2
The correct answer is: D
Explanation
Element X has a valency of 2 while Y has a valency of 1,
so they exchange valency to form \( XY_2\)