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The energy of second Bohr orbit of the hydrogen atom is -328 kJ mol-1, hence the energy of fourth Bohr orbit would be:
(1) - 41 kJ mol-1
(2) -1312 kJ mol-1
(3) -164 kJ mol-1
(4) - 82 kJ mol-1
Ans:- 82 kJ mol-1
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