MCQ
Chromium has the electronic configuration $4{s^1}3{d^5}$ rather than $4{s^2}3{d^4}$ because
- A$4s$ and $3d$ have the same energy
- B$4s$ has a higher energy than $3d$
- C$4{s^1}$ is more stable than $4{s^2}$
- ✓$4{s^1}3{d^5}$ half-filled is more stable than $4{s^2}3{d^4}$
