Electrons
According to the quantum mechanical model, the nucleus is at the center of the atom and the electrons orbit the nucleus within regions of space known as orbitals. The wave particle duality says that the electron is a very small particle that moves with a wavelike motion, so it is useful to have a basic understanding of the electromagnetic spectrum and calculations involving waves. The following powerpoint notes help introduce the basics of the quantum mechanical model:
Here are some videos related to these topics:
Frequency, Wavelength, Speed of Light Video: https://www.youtube.com/watch?v=nwlhAXkzjj0
Calculations Involving Energy, Wavelength, and Frequency: http://www.youtube.com/watch?v=PYNSopwd1l4
In chemistry it is useful to write an electron configuration which describes the orbital location of the electron within the electron cloud of an atom. Here are notes describing electron configurations:
Here is a link to video resources about Electron Configurations:http://www.kentchemistry.com/aplinks/chapters/7atomicstucture.htm
(This website has a series of videos about electron configurations. Parts 1-6 covers pretty much everything you would want to know from electron configurations to quantum numbers.)
Once you have worked through the content, you can practice writing electron configurations using this practice worksheet and the accompanying key:
