Second ionization potential of Li, Be and B is in the order :
(a) Li > Be > B
(b) Li > B > Be
(c) Be > Li> B
(d) B > Be > Li
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Answer:d
Explanation:because boron have smaller atomic radius than berilium than lithium in the second potential
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see ionisation potential increase as we go left to right so but we know that half filled full filled configuration so a)Li>Be>B
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