SD Miramar CHEM 200 - Chemistry 200: General Chemistry I - Lecture (5 pages)

Previewing pages 1, 2 of 5 page document View the full content.
View Full Document

Chemistry 200: General Chemistry I - Lecture



Previewing pages 1, 2 of actual document.

View the full content.
View Full Document
View Full Document

Chemistry 200: General Chemistry I - Lecture

10 views

Lecture Notes


Pages:
5
School:
San Diego Miramar College
Course:
Chem 200 - General Chemistry I Lecture
General Chemistry I Lecture Documents

Unformatted text preview:

Chemistry 200 General Chemistry I Lecture Dr Namphol Sinkaset Chapter 7 Study Guide Concepts 1 Electromagnetic radiation consists of energy propagated by electric and magnetic fields These fields propagate through space in waves that are perpendicular to one another 2 EM waves have two important characteristics frequency and wavelength These two characteristics are related by the speed of light c 3 The electromagnetic spectrum is a continuum of all wavelengths of EM radiation 4 Since EM radiation can be pictured as a wave it has the typical wave properties of interference and diffraction Interference is the term used to describe how waves can combine in different ways to make new waves Diffraction describes how waves can regenerate themselves after encountering obstacles or slits When both of these properties are displayed interference patterns are observed 5 The wave explanation of EM radiation underwent substantial change due to the observed phenomena of blackbody radiation the photoelectric effect and atomic spectra 6 When explaining blackbody radiation Max Planck invoked the idea that atoms can only possess and emit certain quantities of energy These discrete packets of energy were called quanta singular quantum 7 To explain the photoelectric effect Albert Einstein proposed that light had particles of energy called photons 8 The Rydberg equation was formulated to predict lines in atomic spectra but did not explain why lines were observed 9 Niels Bohr combined Planck s and Einstein s ideas into a model of the hydrogen atom 1 The H atom only has certain allowable energy levels Each level is a fixed circular orbit of an e around the nucleus 2 The atom doesn t radiate energy if the e stays in its orbit 3 When the e changes orbit it must emit or absorb energy to do so The energy is exactly equal to the difference in energy between the orbits 10 Since it was observed that energy manifested as EM radiation can act as a particle Louis de Broglie reasoned that matter



View Full Document

Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view Chemistry 200: General Chemistry I - Lecture and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Chemistry 200: General Chemistry I - Lecture and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?