• Bohr used the Rydberg formula to deduce the energies of an electron in a hydrogen atom, not just wavelengths.
• His fascinating approach involved 4 assumptions:
  • Stationary States: Electrons inhabit only specific, unique circular orbits.
  • Fun Fact 🎉: "Stationary" doesn’t mean the electron’s napping! Bohr meant it’s fixed at a particular energy level.
• Radiation Transfer: No radiation is emitted or absorbed while the electron is in its comfy stationary state.
• Energy Switcharoo: Atoms gain or lose energy when they jump between these stationary states.
• Spin & Win! 🌀: The electron’s angular momentum in these states is quantized. How? Using a groovy formula: integer values of h/2π.

⚠️ FYI: Today, we understand that electrons don’t actually circle the nucleus as Bohr imagined. However, this idea still offers a solid foundation for newbies exploring the hydrogen atom!

• Bohr's detective work on line spectra wavelengths led to an energy-level diagram for hydrogen.

  • These energy levels are the only allowed states for a hydrogen atom.
  • Bottom Line: A hydrogen atom can be at -13.58eV or -3.39eV, but never chilling at -4.52eV.

• Ground State: This is the atom's low-energy comfort zone (-13.58eV). Here, the electron and proton are like BFFs, super close and inseparable.

• Excited States: When our atom has more energy than the ground state, it's like it had too much coffee!

  • n = 2 ➡️ First excited state
  • n = 3 ➡️ Second excited state

• Quantized Energy Levels: Energy levels have a limited menu. Think of them like the stops on a subway line – you can’t just drop off anywhere!

• Electrons switch between levels by absorbing or emitting an exact energy amount.

  • These transitions give rise to the colorful spectrum lines we see!
  • Real-world connection 🌈: When you see a rainbow, it's kinda like nature’s spectrum due to water droplets in the atmosphere.

• Principal Quantum Number (n): This number tags the energy levels. Like naming the floors of a building!

• An atom becomes ionized when the electron bails. Imagine this as the electron going on a solo backpacking trip! This state is marked as having zero energy.