In terms of Bohr radius `a_(0)`, the radius of the second Bohr orbit of a hydrogen atom is given by

Options

A. `0.053 nm`
B. `(0.053)/(4)nm`
C. `0.053 xx 4 nm`
D. `0.053 xx 20 nm`

Answer

C

Explanation

`r_(n) = (r_(1) for H xx n^(2))/(Z)`
`= (0.53 Å = 0.053 xx 4 nm`
`(1 Å = 10^(-10)m,1 nm = 10^(-9)m)`