CHEM 101 Lecture Notes - Lecture 5: Rydberg Formula, Quantum Number

• School: VCU
• Department: Chemistry
• Course: CHEM 101
• Professor: Kuda- Mallwathuludge

Document Summary

Frequency v: number of peaks that passes a given point per unit time. Wavelength : distance from one peak to the next. Amplitude: height of wave, measured at centerline between peak and trough. What we perceive is the square of the amplitude. Frequency and wavelength are inversely related: longer wavelength means lower frequency, etc. Shorter wavelength means it has a higher energy level. If the frequency/energy of a photon is below the minimum then no electron is ejected. Amount of energy needed is the work function ( ), lowest for group 1 and. Frequency measures the energies of the photons, intensity measures the number of photons in the beam. Light energy can behave as waves and small particles. Both are quantized, matter and electromagnetic energy occur in discrete amounts. Quantum is the smallest unit of energy (analogous to an atom). Atoms give off light when energized, giving clues to their atomic makeup.