Question

In which of the following sets of orbitals, electrons have equal orbital angular momentum?

• A. $1s$ and $2s$
• B. $2s$ and $2p$
• C. $2p$ and $3p$
• D. $3p$ and $3d$

Answer 1

Answer: (A), (C)

$1s$ and $2s$
$2p$ and $3p$

In 1s and 2s orbitals, electrons have equal orbital angular momentum as they have same value of azmithual quantum number (l).
In 2p and 3p orbitals, electrons have equal orbital angular momentum as they have same value of azmithual quantum number (l).

${\mu }_l=\sqrt{l(l+1)}\frac{h}{2\pi }$

Note:

In 2s and 2p orbitals, electrons have unequal orbital angular momentum as they have different value of azmithual quantum number (l).
In 3p and 3d orbitals, electrons have unequal orbital angular momentum as they have different value of azmithual quantum number (l).