1)   Element Gorilla Plus 1.5 * Drills up to 118 Chemical Elements and Symbols * Choose atoms individually or by groups * 3 different question types * American, English or Custom spelling * Capable of changing the symbols for newly named elements 2)   ChemCalcs 1.0 ChemCalcs provides a unique and intuitive system for mastering fundamental skills and processes essential to theunderstanding of chemistry calculations and concepts. The unique standardised interface system allows students to solve top roblems