Question

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
• B. from n = 2 to n = 4
• C. from n = 5 to n = 1
• D. from n = 3 to n = 5

Answer 1

The correct option is A from 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).