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Find the ratio of Li^(++) ions in its gr...

Find the ratio of `Li^(++)` ions in its ground state assuming Bohr 's model to be vaild

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For hydrogen like ionthe radius of the nth orbit is
`a_(n)= (n^(2)a_(0))/(2)`
For `Li^(++) ,Z= 3` and in ground state `n = 1` , The radius is
`a_(1) = (53pm)/(3) = 18 pm`
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Find the radius of Li^(++) ions in its ground state assuming Bohr's model to be valid.

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An electron in a hydrogen atom makes a transition n_1 to n_2 where n_1 and n_2 are principle quantum numbers of the states . Assume the Bohr's model to be valid , the frequency of revolution in initial state is eight times that of final state. The ratio n n_1/n_2 is

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HC VERMA-BOHR'S MODEL AND PHYSICS OF THE ATOM-Worked Out Examples
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