The Atom Builder 1.0   
by Raylec Software   

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. Includes a reference section
to support students learning with basic facts and information. Price includes full site license.
Use as a demonstration tool (using a projector), as a teaching tool - get pupils to access the reference sections before attempting the simulation, or as a revision tool prior to tests or exams.