The correct order of ionization potential values of $B e, B, L i, C$ atom is :

B e < B < L i < C

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L i < B e < B < C

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L i < B e > B < C

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L i > B e > B < C

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Solution

The correct option is C $L i < B e > B < C$
IP increases on going from left to right. However, Be has greater IP than B due to the stable full-filled 2s-configuration of Be. It is not easy to remove an electron from such a configuration.

Therefore, the ionisation potential order: $L i < B e > B > C$ .

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L i < B < B e < C

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Question 18
Arrange the following elements in the order of their increasing nonmetallic character
Li, O, C, Be, F
(a) F < O < C < Be < Li
(b) Li < Be < C < O< F
(c) F < O < C < Be < Li
(d) F < O < Be < C < Li

Q. The first ionization energies of Li, Be, B and C are in the order.

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The correct order of ionization potential values of Be, B, Li, C atom is :

The correct option is C Li<Be>B<CIP increases on going from left to right. However, Be has greater IP than B due to the stable full-filled 2s-configuration of Be. It is not easy to remove an electron from such a configuration. Therefore, the ionisation potential order: Li<Be>B>C.

The correct order of ionization potential values of $B e, B, L i, C$ atom is :