Question

What is the maximum number of electrons that the third energy level can hold?

• A. $2$
• B. $8$
• C. $18$
• D. $32$

Answer 1

Answer: (C)

$18$

The mass number of electrons an energy level can hold$=2n^2$

Thus mass electrons in $3^{rd}$ energy level$=2{\left(3\right)}^2=2\times 9$

$=18$