Which of the following electron transition in a hydrogen atom will require the largest amount of energy input?
A
from n = 1 to n = 2
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B
from n = 2 to n = 4
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C
from n = 5 to n = 1
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D
from n = 3 to n = 5
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Solution
The correct option is Afrom n = 1 to n = 2 for the electron transition n = 1 to n = 2, the energy change, is positive (more energy is absorbed) for the transition n = 5 to n = 1, change in energy is negative (energy released).