In which of the following transitions is the largest quantum of energy liberated by an hydrogen atom when the electron changes energy levels? [n is the quantum number]
n = 2 to n = 1
n = 1 to n = 2
n = 2 to n = 3
n = 3 to n = 2
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Discussions (6)

The question is not properly composed, for an electron to move higher the energy level it will not release energy, it will only go up when it is provided with energy I.e when excited
But when it goes down the energy level it will release energy
The question should have been which of the following will require the highest amount of energy not will liberate energy,
If it is to liberate energy answer is 2 to 1.....
Requre energy 1 to 2

Greetings, The Myschool Team.
The correct answer is A(n = 2 to n = 1) and not B(n = 1 to n = 2). An atom liberates energy when it moves from a higher energy level to a lower energy level. n = 2 is a higher energy level than n = 1. Thus, the atom liberates energy when moving from n = 2 to n = 1. To go the reserve direction would require absorption of energy, not liberation as the question demands. Thus, the correct answer is A(n = 2 to n = 1) and not B(n = 1 to n = 2). Thank you.

The answer should be 'd'. When hydrogen moves from n=1 to n=2 it absorbs and not liberate energy

The answer should be 'd'. When hydrogen moves from n=1 to n=2 it absorbs abs not liberate energy

