Question

From the following identify the appropriate one.
1. It is observed that electron density in $xy$ plane in $3d_{x^2-y^2}$ orbital is zero
2. It is observed that electron density in $xy$ plane in $3d_{z^2}$ orbital is zero
3. $2s$ orbital has only one spherical node
4.The nodal plane for $2p_z$ orbital is $yz$ .

• A. 2 and 3
• B. 1,2,3,4
• C. Only 2
• D. 1 and 3

Answer 1

Answer: (A)

The four lobes of $d_{x^{2}a-y^2}$ orbital are lying along x and y axes, while the two lobes of $d_{z^2}$ orbital are lying along $z$ -axis, and contain a ring of negative charge surrounding the nucleus in xy plane.
2s orbitals has one spherical node, where electron density is zero.
p-orbital have direction character.
Orbital $\to p_z{p}_x{p}_y$
$m\to 0\pm 1\pm 1$
Nodal plane $\to xyyzzx$