Question

why dz² has no nodal plane?​

Answer 1

A nodal surface is also called a radial node, which is a hollow spherical region in which electrons cannot be. A nodal plane is also called an angular node, which is either a plane where electrons cannot be, or a conic surface ( dz2 orbital)

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Answer 2

Answer:

here is your answer ⤵️⤵️

As we have learnt nodes are the positions where radial wave function passes through zero these are also called radial nodes. besides radial nodes the probability density function for np orbitals are zero at the plane passing through the nucleus. in case of 2px orbital yz plane is a nodal plane. this is called angular node or nodal plane. similarly four 3d orbitals have two perpendicular nodal planes that intersects in a line passing through the nucleus . in general in an orbital :-

➡️ total no. of nodes =n-1

➡ Angular nodes = l

➡ Radial nodes =n-l-1

➡ so, it's noted that dz² orbital has one conical surface which is counted as two angular nodes.