Question

Select the incorrect option regarding $5p_x$ orbital.

• A. Number of maxima for the curve $4\pi r^2{R}^2\left(r\right)$ v/s r are three for the orbital.
• B. It has probability of finding an electron in only yz-plane
• C. Quantum numbers $n$, $l\&m$ for orbital must be 5, 1 & -1 respectively
• D. Probability at yz-plane is zero

Answer 1

Answer: (A), (B), (C)

The correct options are
A Number of maxima for the curve $4\pi r^2{R}^2\left(r\right)$ v/s r are three for the orbital.
B It has probability of finding an electron in only yz-plane
C Quantum numbers $n$, $l\&m$ for orbital must be 5, 1 & -1 respectively

For $5p_x$ orbital:
(A) Number of maxima in $4\pi x^2{R}^2\left(r\right)$ v/s r curve would be one more than the radial nodes.
$n-l-1\Rightarrow 5-1-1=3$
$\therefore$ maxima's are 4

(B) & (D) Nodal plane for $5p_x\Rightarrow yz$
$\therefore$ it has no probability of finding electron in yz plane.

(C) $n=5$
$l=1$
$m=-1,+1$ (not necessarily 1)