A useful (although not flawless) reference for chemistry students, this app includes a very nicely annotated periodic table that displays many properties beyond just the atomic weight of each element ...

Chemical Reactions - Ionic Formula Writing: Students learn how to write formulas. Chemical Reactions - Ionic Formula Writing Students learn how to write formulas for a variety of ionic compounds ...

Subscript, or sub, letters are important when writing math or chemistry formulas because, without these letters, the formulas would be unintelligible. Excel was designed to write and use math or ...