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 $ \rightarrow p_{z}p_{x} \, p_{y}$
$ \, m \rightarrow 0 \, \pm1\pm1$
Nodal plane $ \rightarrow xyyzzx$