Answered

Which electron transition represents a gain of energy?

Afrom 2nd to 3rd shell
Bfrom 2nd to 1st shell
Cfrom 3rd to 2nd shell
Dfrom 3rd to 1st shell

Verified Answer :

superman1987

The correct answer is (A) from 2nd to 3rd shell.


The explanation :


when a gain of energy is the shift of the electrons from a shell of low energy to the shell of high energy


and we have here 2nd shell is the shell of low energy, and 3rd shell is the shell of high energy.


∴ (A) from 2nd to 3rd shell is the correct answer.

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