Identify the correct statement(s): the findings from the Bohr model of H-atom are-

Options

A. angular momentum of electron is expressed as integral multiples of `(h)/(2pi)`
B. the first Bohr radius is 0.529 Å
C. the energy of the n-th level `E_(n)` is proportional to `(1)/(n^(2))`
D. the spacing between adjacent levels increases with increase in 'n'.

Answer

A, B, C

Explanation

(a) Angular momentum `=(nh)/(2pi),n=1,2,3, . .`
(b) `a_(0)=0.529` Å
(c) `E_(n)=(Z^(2))/(n^(2))xx(2pi^(2)me^(4))/(h^(2))`, Therefore, `E_(n)prop(1)/(n^(2))`.