If the following atoms and molecylates for the transition from `n = 2` to `n = 1`, the spectral line of minimum wavelength will be produced by

Options

A. hydrogen atom
B. decterium atom
C. uni-ionized helium
D. di-ionized lithium

Answer

D

Explanation

`(1)/(lambda) = RZ^(2) ((1)/(1^(2)) - (1)/(2^(2)))`
For di-ionised lithium the value of `Z` is maximum.