|
 |
|
The Atom Builder
Chemistry teaching software which simulates the building of any of the first 20 atoms (up to calcium) on screen. Learn how atoms are formed from electrons, protons and neutrons and how the electrons are arranged in shells or energy levels.
WMD SWAG PalmOS Bundle
WMD SWAG quickly analyzes your observations at a disaster site and provides a fast, scientific guess of which agents of mass destruction are most likely involved. Just mark checkboxes beside any conditions you observe in the field, then view results.
|
|
|
 |
|
 |
|
