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Number of times radius of the 3rd shell ...

Number of times radius of the 3rd shell of the H-atom as compared to that of radius of first shell is

Text Solution

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The correct Answer is:
9
`r_(n) = a_(0) n^(2)//Z`. For H, Z = 1 and for n = 3
`r_(3) = a_(0) xx 3^(2) = 9 a_(0)`
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