Question

Angular momentum in $2^{nd}$ Bohr orbit of $H-$atom is $x$. Then, find out angular momentum in $1^{st}$ excited state of $L{i}^{+2}$.

• A. $3x$
• B. $9x$
• C. $\frac{x}{2}$
• D. $x$

Answer 1

Answer: (D)

$x$

For ${Li}^{+2}$ , the first excited state is n=2. So angular momentum of ${Li}^{+2}$ is same as angular momentum of $H$-atom in $2^{nd}$ Bohr orbit.

Hence, the correct option is $D$