CHEM 110 Lecture Notes - Lecture 2: Atomic Number, Hmu Language, Photon

• School: McGill University
• Department: Chemistry
• Course: CHEM 110
• Professor: Ian Sydney Butler, Pallavi Sirjoosingh

Document Summary

If n=2, the atom is in the first excited state. E = efinal - einitial = hv = hc/ . 6. 3 the wave particle duality of matter and energy: Louis de broglie was trying to explain why an atom has fixed energy levels, and considered other systems that display only certain allowed motions, such as the vibrations of a plucked guitar string. If energy is particle-like, perhaps matter is wavelike. If electrons have wavelike motion in orbits of fixed radii, they would have only certain allowable frequencies and energies. Where mu (mass times velocity) is the denominator also known as momentum of the particle. If electrons travel in waves, they should exhibit the properties of waves. In other words, electrons should show diffraction and interference patterns, just as light does. The figure 6. 14 illustrates that electrons - particles with mass and charge - create diffraction patterns, just as electromagnetic waves do.