App name: The Chemical Touch
What is it? Explore the properties of the elements, the standard amino acids, and the nucleobases with The Chemical Touch, touch-sensitive periodic table and chemical information companion.
Best for: Students
Requirements: iOS 2.2.1 or later
Features: The Chemical Touch provides a wealth of information right at your fingertips. In addition to atomic mass, properties such as the density, melting point, boiling point, atomic radius, and electronegativity can be selected to recolor the periodic table to display trends in these common properties. Having exhausted the displayed information, click the internet button to see the Wikipedia page for the selected element or amino acid.