How do you get a theorem named after you? Euler knows what it takes! The third lesson of five asks pupils to use an interactive activity to compare the faces, vertices, and edges of seven different three-dimensional solids. They use...

Study chemical bonding in chemistry including atoms, valence electrons, ionic and covalent bonding, and how molecules are formed on this site!

ChemCenter, available from the American Chemical Society, provides chemistry news, reference sources and other public services.

To the left. To the left. The elements in the left column of the period table are alkali metals with the exception of hydrogen. This is a brief overview of the alkali metals, what their family is all about and how well they bond or do...

Get the skinny on the noble gases on the periodic table. Find out why this family is happy, how well they bond, and exactly who is a part of this happy family.

A concise description of ionization energy, and a line graph that plots the ionization energies of the first 88 elements vs. the atomic numbers.