1.

Atom of ""_(100)Fm^(257) follow Bohr model. Its radius is n times Bohr radius then value of n………….

Answer»

<P>100
200
4
`(1)/(4)`

Solution :For `""_(100)Fm^(257)` atom electron will be in l, m, n, o, p orbit.
`:.` Electron will be residing upto `5^(TH)` orbit,
`:.r_(p)=(p^(2))/(Z)r_(0)`
`nr_(0)=((5)^(2))/(100)r_(0)`
`:.nr_(0)=(1)/(4)r_(0)"":.n=(1)/(4)`


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