Help for understanding bonding better
Students, please visit http://www.wwnorton.com/college/chemistry/gilbert/overview/ch7.htm for some further information on bonding, hybridization, and sigma and pi bonds.
Also try http://antoine.frostburg.edu/chem/senese/101/periodic/ for a nice explanation on periodic trends. A second site is http://members.aol.com/profchm/periodic.html
A site for atomic radii discussion is http://www.chemguide.co.uk/atoms/properties/atradius.html
I am posting these early in hopes that some of you may get ahead.