why I.E1 of Be >I.E1 of B but IE2 of Be < IE2 of B

Asked by aasthabba | 12th Sep, 2011, 02:51: AM

Expert Answer:

I.E1 of Be is larger than the I.E1 of B because the first electron in Be is removed from the completely filled 2s-orbital which is extra stable. Hence more energy is required to remove that electron. The second electron in Be is removed from the half filled 2s orbital while the second electron in B is removed from the completely filled 2s orbital. Therefore I.E2 of Be is smaller than the I.E2 of B.

Answered by  | 12th Sep, 2011, 12:08: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.