Question
Chemistry Question on Atomic Models
The number of s-electrons present in an ion with 55 protons in its unipositive state is
A
8
B
12
C
9
D
10
Answer
10
Explanation
Solution
The correct answer is (D) : 10
Z=55[Cs]⇒[Xe]6s1
[Cs+]⇒[Xe] i.e. upto 5s count e−of s-subshell
i.e. 1s,2s,3s,4s,5s⇒10 electrons