State significance of $Ψ$ and $Ψ^{2}$ . Draw radial probability density and radial probability distribution curves for $1 s, 2 s, 2 p, 3 s, 3 p, 3 d, 4 s, 4 p$ .

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Solution

$ψ$ is a wave function and refers to the amplitude of electron wave i.e. probability amplitude. It has got no physical significance. The wave function ψ may be positive, negative or imaginary
(ii) $ψ$ 2 is high, the probability of finding an electron is high i.e. electron is present at that place for a long time.

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List - I	List - II
I) Radial probability distribution curve of 3s orbital	a) $1.1 ˚ A$
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IV) No spherical nodes	d) $0.53 ˚ A$

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