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CGP EDU Academic Team
Published on: August 14, 2026
The ionization energy of a certain element is 412 kJ mol –1 . When the atoms of this element are in the first excited state, however, the ionization energy is only 126 kJ mol –1 . The region of the electromagnetic spectrum in which the wavelenght of light emitted in a transition from the first excited state to the ground state is
Text Solution
Verified by ExpertsThe correct answer is:
A
Ionization energy = 412 kJ mol –1 
E 2 – E 1 = – 126 + 412
Energy in 
= 4161.0 
visible region
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