The electron in `Li^(2+)` ions are excited from ground state by absorbing 8.4375 `R_H` energy/electron. How many emission lines are expected during de-excitation of electrons to ground state ?

Answer

3

Explanation

`bar(upsilon) = R_H .Z^2 [ 1/1^2 - 1/n^2 ] and E= h c bar(upsilon)`