The electron in a hydrogen atom makes a transition from an excited state to the ground state. Which of the following statements is true.
Answer & explanation
Correct answer: option 1
For hydrogen and hydrogen like atoms $E_n=-13.6 \frac{z^2}{n^2} ~eV$
$U_n=2 E_n=-27.2 \frac{z^2}{n^2} ~eV$ and $K_n=\left|E_n\right|=13.6 \frac{z^2}{n^2} ~eV$
From these three relations we can see that as n decreases, $K_n$ will increase but $E_n$ and $U_n$ will decreases.