Atomic Structure Question 341
Question: An atom has 2 electrons in $ K $ shell, 8 electrons in $ L $ shell and 6 electrons in $ M $ shell. The number of $ s $ -electrons present in that element is [CPMT 1989]
Options:
A) 6
B) 5
C) 7
D) 10
Show Answer
Answer:
Correct Answer: A
Solution:
Shell = K, L, M = $ 1s^{2} $
$ 2s^{2}2p^{6} $
$ 3s^{2}3p^{4} $
Hence the number of s electron is 6 in that element.
