Question 46
Modern PhysicsCalculate the energy of the third level of an atom if the ground state energy is −24.8eV
- A.−9.20eV.
- B.−8.20eV.
- C.−2.75eV.
- D.−1.75eV.
Show the answer and explanation
Answer: C (−2.75eV.)
Explanation
En = E1/n2, so E3 = −24.8 ÷ 9 ≈ −2.75 eV.