According to Bohr's model of atom the orbit of an electron ...... [Where n is quantum number and Z = atomic number].

Options

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

Answer

B

Explanation

`r_(n)prop(n^(2))/(Z)`
`r_(n)=(n^(2)h^(2)in_(0))/(piZe^(2)m)`, here `(h^(2)in_(0))/(pie^(2)m)` =constant