GPS location apps on a smartphone can be very handy when mapping a travel route or finding nearby events. But how does your smartphone know where you are? Wilton L. Virgo explains how the answer lies 12,000 miles over your head, in an...

The Pauli Exclusion Principle requires that all electrons in an atom have unique energy levels.

Here at Chem4Kids you can find some great information about the third element in the periodic table, lithium. Content focuses on lithium's electrons, where you can find lithium in nature, and how it bonds with other elements (or with...

Using diagrams, illustrated examples, and student practice this chemistry class tutorial explains quantum numbers.

Explains what the electron model is and the scientists who contributed to its development.