1)   PL Table 4.3.0.1
It provides an exhaustive information on each element more than 30 data types for each chemical element and special built-in calculator to balance the most complicated chemical equations.

 2)   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