Question

Quantum transitions that result in the characteristic sharp lines of the X-ray spectrum always involve
1. protons within the nucleus.
2. emission of beta particles from the nucleus.
3. electron energy levels that have the same principal quantum number.
4. neutrons within the nucleus.
5. the inner electron shells.

Answer 1

Answer: 5

Explanation: this is because the energy level of the emitted of absorbed photon increases as the number of electron shell decreases, thereby making the inner shell have higher energy than other shells