When the element Li, Be, and B are arranged in order of increasing ionization energy, what is the correct order ?

Li, B, Be

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B, Be, Li

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Be, Li, B

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Li, Be, B

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Solution

The correct option is A Li, B, Be
Along the period IE increases but Be has higher IE than B owing to its stable fully filled orbital configuration.
Hence the order will be $L i < B < B e$ .

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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

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When the element Li, Be, and B are arranged in order of increasing ionization energy, what is the correct order ?

The correct option is A Li, B, BeAlong the period IE increases but Be has higher IE than B owing to its stable fully filled orbital configuration.Hence the order will be Li<B<Be.

The correct option is A Li, B, Be
Along the period IE increases but Be has higher IE than B owing to its stable fully filled orbital configuration.
Hence the order will be $L i < B < B e$ .