Classification Of Elements And Periodicity In Properties Ques 71
Question: Which element having following electronic configurations has minimum ionization potential [NCERT 1978; KCET 1991; CBSE PMT 1991; Pb. PET 1999; BHU 2000]
Options:
A) $ 1s^{1} $
B) $ 1s^{2},2s^{2},2p^{6} $
C) $ 1s^{2},2s^{2},2p^{6},3s^{1} $
D) $ 1s^{2},2s^{2},2p^{2} $
Show Answer
Answer:
Correct Answer: C
Solution:
$ 1s^{2}2s^{2}2p^{6}3s^{1} $ . It belongs to IA group which has least ionization potential and it decreases down the group
