Question

Element X has the highest first electron affinity in its period; the ground state electron configuration of it's most common ion is [Kr] 5s^2 4d^10 5p^6

a Element Y is the second largest element in it's period; it's valence electrons are in orbital(s) that have n=6

what is the most stable compound formed when elements X and Y are combined

Is element X Iodine? Is element Y cesium?

If it is how do you write the most stable compound of the element?

Answer 1

Element X is Iodine as it has the highest first electron affinity
Element Y is Barium
Barium is the second largest element in its period and has valence electrons in n=6 .
Most stable compound formed would be BaI2