Question

Which one will have the highest 2nd
ionisation energy?
(A) 1s2 282 2p 3s
(B) 1s 2s 2p+
(C) 1s2 2s2 2p
(D) 1s2 2s 2p 3s?​

Answer 1

Answer:

The element with electronic configuration 1s

2

2s

2

2p

6

3s

1

will have highest second ionization enthalpy. 1s

2

2s

2

2p

6

3s

1

loses one electron to form 1s

2

2s

2

2p

6

. It is stable electronic configuration of noble gas Ne. Removal of second electron will require large amount of energy as it will break stable noble gas electronic configuration.

Answer 2

C has an correct option