Ranking Energy Levels in Quantum Mechanics

Rank from highest to lowest energies. First exited state Second exited state Third exited state Ground state

In quantum mechanics, the energy levels of a system, such as an atom or a molecule, are typically ranked from lowest to highest. The ground state has the lowest energy, while excited states have progressively higher energies. Therefore, the ranking from highest to lowest energy is as follows:

1. Third excited state
2. Second excited state
3. First excited state
4. Ground state

So, the order from highest to lowest energy is:

• Third excited state
• Second excited state
• First excited state
• Ground state