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  4. The probability distribution curve for 2s electron appears like

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Q. The probability distribution curve for $2s$ electron appears like

Structure of Atom

Solution:

image
Given : The probability distribution curve for $2 s$ electron appears like:
Solution :
For 2s: $n =2$ and $l = o$ for the given atomic orbital (2s orbital), the number of radial nodes $=2-0-1=1$. Hence the radial probability distribution curve should contain a trough representing a radial node .Hence the radial probability distribution curve should contain a trough representing a radial node.