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The radius of hydrogen atom in its ground state is 5.3xx10^(-11)m. After collision with an electron it is found to have a radius 21.2xx10^(-11) m, then principle quantum number n of the final state of the atom ......

Answer»

N=4
n=2
n=16
n=3

Solution :`rpropn^(2)`
`(r_(2))/(r_(1))=((n_(2))/(n_(1)))^(2)`
`r_(2)=` radius in final state
`r_(1)=` radius in ground state
`:.(21.2xx10^(-11))/(5.3xx10^(-11))=((n_(2))/(1))^(2)`
`:.4=n_(2)^(2)`
`:.n_(2)=2`


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