Warm-Up What is the difference between the Bohr’s Model of the Atom and the Quantum Model of the atom. What wavelength is associated with an electron.

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Warm-Up What is the difference between the Bohr’s Model of the Atom and the Quantum Model of the atom. What wavelength is associated with an electron that falls from n=3to n=2? What color of the visible light spectrum would that be associated with?

Part of the electromagnetic spectrum

Arranged from longest to shortest wavelength

How do you convert from nanometers to meters? So 656 nm is how many meters? What color of light is this?

- 2.179×10⁻¹⁸ = Rydberg constant

Calculating the energy of H atom Calculate the energy difference between E3 and E2 in the hydrogen atom. Calculating the energy of H atom

Calculate the energy difference between E4 and E2 in the hydrogen atom.

proposed that electrons have wave properties 1924 – Louis de Broglie proposed that electrons have wave properties

A particle of matter has a wavelength! 1924 – Louis de Broglie Any particle of mass m moving with a velocity v will have a de Broglie wavelength given by the following equation:  = h mv A particle of matter has a wavelength!

Quantum Theory – Max plank -1900 Energy of a single quantum of energy (Photon) = where E = energy (in Joules) h = Plank’s constant 6.63 x 1034 J  s  = frequency