A) \[r\propto n\]
B) \[r\propto 1/n\]
C) \[r\propto {{n}^{2}}\]
D) \[r\propto 1/{{n}^{2}}.\]
Correct Answer: C
Solution :
We know that the radius of the \[{{n}^{th}}\] orbit of a hydrogen like atom/ion is given by \[{{r}_{n}}={{n}^{2}}{{a}_{0}}\] where \[{{a}_{0}}\]= Bohr radius = radius of the ground state of the hydrogen atom \[\therefore \] \[{{r}_{n}}\propto {{n}^{2}}\]
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