The Wave Number of the First Line Of Balmer Series Of Hydrogen Is 15200 Per Cm. The Wave Number Of The First Balmer Line Of Li(+2) Is i) 15200 Per Cm ii) 60800 Per Cm iii) 76000 Per Cm iv) 136800 Per Cm

Dear Student,

The energies of the stationary states for hydrogen like species such as Li2 +, He+, etc. are integral multiple of Z2 times the energies of the stationary states for hydrogen atoms, in similar transitions.

Hence, the wave number of the first Balmer line of Li 2+ ion = 32 x 15200/cm = 9 x 15200/cm = 136800/cm.

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