Structure Of Atom Question 3
Question 3 - 24 January - Shift 2
The number of s-electrons present in an ion with 55 protons in its unipositive state is
(1) 8
(2) 9
(3) 12
(4) 10
Show Answer
Answer: (4)
Solution:
Formula: Electronic Configuraton
$Z=55[Cs] \Rightarrow[Xe] 6 s^{1}$
$[Cs^{+}] \Rightarrow[Xe]$ i.e. upto 5 s count $e^{-}$of s-subshell
i.e. $1 s, 2 s, 3 s, 4 s, 5 s \Rightarrow 10$ electrons
