According to Bohr's theory the radius of electron in an orbit described by principle quantum number `n` and atomic number `Z` is proportional to

Options

A. `Z^(2)n^(2)`
B. `(Z^(2))/(n^(2))`
C. `(Z^(2))/(n)`
D. `(n^(2))/(Z)`

Answer

D

Explanation

`r = (epsilon_(0)n^(2)h^(2))/(pi Zme^(2)) , :. r prop (n^(2))/(Z)`