Choose the correct statement (s) for hydrogen and deuterium atoms (considering the motion of nucleus)

Options

A. The radius of first Bohr orbit of deuterlum is less than that of hydrogen
B. The speed of electron in first Balmer line of deuterlum is more than than that of hydrogen
C. The wavelength of first Balmer line of deuterium is more than that of hydrogen
D. The angular momentum of electron in the first Bohr orbit of deuterium is more than that of hydrogen

Answer

A

Explanation

We have `r prop (1)/(mu) , mu = "reduced mass"`
`(Kq^(2))/(r)= (mv_(e)^(2))/(r_(e)) = (mv_(N)^(2))/(r_(N)) , mv_(e)r_(e) = (nh)/(2pi)`