1.

If radius of first orbit in hydrogen atom is 0.53Å, then what will be the radius of fourth orbit?

Answer»

`0.193Å`
`4.24Å`
`2.12Å`
`8.48Å`

Solution :`r_(N)propn^(2)`
`:.(r_(1))/(r_(2))=(n_(1)^(2))/(n_(2)^(2))`
`:.r_(2)=(n_(2)^(2))/(n_(1)^(2)).r_(1)=(4^(2))/(1^(2)).(0.53)`
`:.r_(2)=(16)/(1)(0.53)=8.48Å`


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