Which element having the following electronic configuration has minimum ionisation potential ?
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a
1s1
b
1s22s22p6
c
1s2,2s22p6,3s1
d
1s2,2s22p2
answer is C.
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Detailed Solution
(1) 1s22s22p63s1. It belongs to IA group which has least Ionization potential .(2) It readily looses electron to gain noble gas configuration hence it has low I.P.