Question

What is the maximum number of electrons that can be accommodated in the K-shell of an atom?

• A. 10
• B. 8
• C. 2
• D. 18

Answer 1

The correct option is C 2

According to the Bohr-Bury scheme,
the maximum number of electrons in a shell = ${2n}^2$
where n is the orbit number.

For K-shell, n = 1
Putting the value of n in the above formula, we get
${2n}^2$ = $2\times$ $1^2$ = 2

Thus, K-shell can accommodate a maximum of 2 electrons.