How many unpaired electrons would you expect in each of these atoms?

Question

As, Te , Sb , Hf

Answer 1

since As is 4s2 4p3 you'd expect 3 unpaired electrons

Te is 5s2 5p4 so you would expect 2 unpaired electrons

Sb is 5s2 5p3 so again, 3 unpaired electrons

Hf is 6s2 5d2 so there would be two unpaired electrons

Answer 2

properly pisgahch, i trust the reason given. in spite of the reality that a great style of power is mandatory for the 2d electron affinity, lots of the oxides shaped are having oxidation state -2 ! why ? the reason being the severe power being released while oxide form good ionic bond with metallic.(Lattice power).. this great quantity of power released merely outweighs the ability mandatory for the 2d electron affinity. Oxygen kinds quite often ionic bond with metals different than Al and a few severe fee density metallic with severe polarising ability.