Question

What is the maximum number of electrons that the O-shell of an atom can accommodate?

• A. 32
• B. 64
• C. 50
• D. 18

Answer 1

The correct option is C 50

The maximum number of electrons that can be accomodated in the ${\text{n}}^{\text{th}}$ shell of an atom is calculated by the formula $2{\text{n}}^2$, where n is the shell number.
O-shell is the $5^{\text{th}}$ shell and hence n=5.
So, there can be 2 x$(\text{5}{)}^2$ electrons,
=2 x 25
=50
Therefore, there can be upto 50 electrons in the O-shell of an atom.