Consider the following statements
$| Ψ^{2} |$ is a measure of electron density at a point in an atom
Radial probability function $(= 4 π r^{2} R^{2} Ψ^{2})$ gives the probability of finding the electron at a distance r (atomic radius) from the nucleus regardless of direction
III. The shape of an orbitals is defined as a surface of constant probability density that encloses some large fractions of the probability of finding the electron.
Select the correct statements.

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Both I and II

All of these

Both II and III

Both I and III

answer is D.

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Detailed Solution

I. $| Ψ^{2} |$ is a measure of electron density at a point in an atom. Thus, the statements is correct.

II. Radial probability function $4 π^{2} R^{2} Ψ^{2}$ gives the probability of finding the electron at a distance t from the nucleus regardless of direction. Thus, the statement is correct.

III. The shape of an orbitals is defined as a surface of constant probability density that encloses some large fraction of the probability of finding the electron. Thus, the statement is correct.

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