Question

Which of the following sets of four quantum numbers an electron will have the highest energy?

• A. $321\frac{1}{2}$
• B. $42-1\frac{1}{2}$
• C. $410-\frac{1}{2}$
• D. $500-\frac{1}{2}$

Answer 1

Answer: (B)

$42-1\frac{1}{2}$

Energy depends on $(n+l)$

$A\to (n+l)=5$

$B\to (n+l)=6$

$C\to (n+l)=5$

$D\to (n+l)=5$

$\therefore$ Max energy for $B$