Physics 2-8-12 Newton’s Law of Universal Gravitation

PHYSICS – There is a fourth one? Yep – Newton’s law of universal gravitation! So when you jump off of something, the Earth moves, huh? You’ve learned little g, now you know big G! Great job on the problems, also make sure you can apply the concepts!


flickr photo by serhio

Hon Chemistry 2-8-12 Ionic Radii & Electronegativity

HON CHEMISTRY – Hey guys, here’s the lecture on valence electrons and how you find the possible ion charge of an atom. Three things to get straight – valence electrons, how many electrons an atom gains or loses, and how that relates to the charge of the atom. Also today we talked about the last periodic trends – ionic radii and electronegativity. Have you begun to notice a trend among the trends? Don’t forget Linus Pauling!