Question

Select the correct statement(s) regarding $3p_y$ orbital:

• A. Total no. of nodes are 2
• B. Number of maxima in the curve $4\pi r^2{R}^2$ vs $r$ are two
• C. Quantum no. $n,l$ and $z$ for orbital may be $3,1,-1$ respectively
• D. The magnetic quantum number may have a positive value

Answer 1

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

The correct options are
A Total no. of nodes are 2
B Number of maxima in the curve $4\pi r^2{R}^2$ vs $r$ are two
C The magnetic quantum number may have a positive value
D Quantum no. $n,l$ and $z$ for orbital may be $3,1,-1$ respectively

For $3p_y$ orbital; $n=3,l=1$
Total no. of nodes $=n-1=2$

QUANTUM NUMBERS: The set of four integers required to define an electron completely in an atom are called quantum numbers.The first three have been derived from Schrodinger wave equation.

Principle quantum number (n) :

It describes the size of the electron wave and the total energy of the electron. It has integral values 1,2,3,4......., etc, and is denoted by K, L, M, N.........., etc.

Azimuthal quantum number (l) :

It describes the shape of the electron cloud and the number of subshells in a shell. It can have values from 0 to ($n1$).

Magnetic quantum number (m) :

It describes the orientations of the subshells. It can have values from $-lto+l$ including zero, i.e., total ($2l+1$) values.