Question

in ground state He+ ion how much energy is supplied so that second line of balmer series is obtained in its spectrum?​

Answer 1

Answer:

E = 10.2 electron Volts.

Explanation:

E = 13.6 *  (1/ni^2 -1/nf^2) * z^2 electron volts

z = 2 ( atomic number of He )

In case of Balmer series; in the second line of Balmer series :

ni = 2 & nf = 4  

E = 13.6 * (1/2^2 -1/4^2) * z^2  

E = 10.2 electron Volts.