The energy of the 4th orbit in a hydrogen atom is:
Correct answer: D. -0.85 eV
- A. -2.51 eV
- B. -3.50 eV
- C. -13.6 eV
- D. -0.85 eV
Explanation
The energy of the nth energy level in hydrogenE = -R(1/n²) and R = 2.18x10-18 J Rydberg constant in JoulesE = -2.18x10-18 J (1 / 4²)E = -1.36x10-19 JE = 0.85 electron voltsThe negative sign is present because the 0-level is considered the highest energy, and so all of the other energy levels are in an "energy well."
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