The graph showing the variation of probabilit | vedclass

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(B) The region where the probability density function,$\psi^2(r)$ reduces to zero is called a nodal surface or simply a node.For an $ns$ orbital,the n

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$2s-$orbital

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(B) The region where the probability density function,$\psi^2(r)$ reduces to zero is called a nodal surface or simply a node.For an $ns$ orbital,the number of radial nodes is given by $(n-1)$.The provided graph shows one point where the probability density touches the $r$-axis (one radial node).For $1s$ orbital: $(n-1) = (1-1) = 0$ nodes.For $2s$ orbital: $(n-1) = (2-1) = 1$ node.For $3s$ orbital: $(n-1) = (3-1) = 2$ nodes.Since the graph has one node,it represents the $2s-$orbital.

The graph showing the variation of probability density,$\psi^2(r)$ with the distance of the electron from the nucleus,$r$ is given below. This represents:

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