Which one will have the highest 2nd ionisation energy?

Which one will have the highest 2nd ionisation energy?

Q. Which one will have the highest 2nd ionisation energy?

A.            1s2 2s2 2p6 3s1

B.            1s2 2s2 2p4

C.            1s2 2s2 2p6

D.            1s2 2s2 2p6 3s2

Answer: 1s2 2s2 2p6 3s1

Gkseries: Gkseries.com is a premier website to provide complete solution for online preparation of different competitive exams like UPSC, SBI PO, SBI clerical, PCS, IPS, IAS, IBPS PO, IBPS Clerical exam etc. & other graduate and post-graduate exams. Learn more on about us page