Successive ionisation energies of an element X are given bel... — Chemistry | Mockzy | Mockzy

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Successive ionisation energies of an element X are given below (in Kcal) IP1 = 165, IP2 = 195, IP3 = 556, IP4 = 595 Electronic configuration of the element X is:

A

1s2 2s2 2p6 3s2 3p1

B

1s2 2s1

C

1s2 2s2 2p2

D

1s2 2s2 2p6 3s1

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