Question

The unpaired $e^{-}$ an unknown species X in its ground state configuration, belonged to its highest principal quantum number 4. If the orbital containing the unpaired electron has no angular nodes, then which of the following is correct.

• A. Atomic number of the species $>36$
• B. $X^{+}$ is isoelectronic with $F^{-}$
• C. $X^{+}$ is paramagnetic
• D. The orbital angular momentum of unpaired electron in X is zero
• E. $X$ is isoprotonic with $Na$

Answer 1

Answer: (D)

The orbital angular momentum of unpaired electron in X is zero

Since, the orbital containing the unpaired electron has no angular nodes, the orbital angular momentum of unpaired electron in X is zero. This corresponds to s subshell.