Correct order of second ionisation energies ?

L i > B > B e

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N e > N > O

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N a > M g > A I

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L i > B e > B

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Solution

The correct option is A $L i > B > B e$
The correct order of second ionisation enthalpy.

$L i^{+} = 1 s^{2}$

$B e^{+} = 1 s^{2} 2 s^{1}$

$B^{+} = 1 s^{2} 2 s^{2}$

So, the order would be

$L i > B > B e$

Hence, the correct option is $A$

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Similar questions

L i < B < B e < C

O < N < F

B e < N < N e

H e, L i, B e, B, C, N, O, F, N e

1^{s t}

Correct orders of $1 s t$ I.P. are -

(i) Li < B < Be < C

(ii) O < N < F

(iii) Be < N < Ne

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