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(B) Probability density is defined as $|\psi|^2$. Since it is a square of the wave function,it can never be negative.Nodes are regions where the proba

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It can be zero for $3p$ orbital.

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(B) Probability density is defined as $|\psi|^2$. Since it is a square of the wave function,it can never be negative.Nodes are regions where the probability density is zero.For a $3p$ orbital,the radial node is present where the radial wave function $R(r)$ becomes zero,which is also where the probability density $|R(r)|^2$ becomes zero,as shown in the provided graph.Therefore,the correct statement is that it can be zero for $3p$ orbital.

The correct statement about probability density (except at infinite distance from the nucleus) is:

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