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The values of quantum numbers n, l and m for the fifth electron of boron is

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n = 2, l = 1, m = –1

n = 2, l = 0, m = –1

n = 2, l = 2, m = –1

n = 1, l = 2, m = –1

answer is A.

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Detailed Solution

Electronic configuration of 'B' = 1s²2s²2p¹

for '2p' electron, n=2,l=1,m=-1,0,+1

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