Question

Maximum number of electrons in a subshell of an atom is determined by the following:

• A. $2l+1$
• B. $4l–2$
• C. $2n^2$
• D. $4l+2$

Answer 1

The correct option is D $4l+2$

For a given shell, $l$, the number of subshells, $m_l=(2l+1)$ Since each subshell can accommodate $2$ electrons of opposite spin, so maximum number of electrons in a subshell = $2(2l+1)=4l+2$.