As an electron jumps from the fourth orbit to the second orbit in Be ion, its — Atomic Structure Chemistry Question

💡 Solution & Explanation

When dropping from $n=4$ to $n=2$, the value of $n$ decreases. K.E. $\propto \frac{1}{n^2}$ (increases), speed $\propto \frac{1}{n}$ (increases), frequency $\propto \frac{1}{n^3}$ (increases), P.E. $\propto -\frac{1}{n^2}$ (becomes more negative, thus decreases). Therefore, correct answer is A, B, C, D.