First slide

Periodicity in atomic properties

Question

Which of the order for ionisation energy is correct

Moderate

A

$B e > B > C > N > 0$
B

$B < B e < C < 0 < N$
C

$B < Be < C < N < 0$
D

$B < B e < N < C < 0$

Solution

Ionisation energy increases across the period but due to stable half filled configuration of $V A$ group. its I.E. is more than $V I - A$ group.

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