The Chemistry Reference Tables (CRT) is an invaluable tool for all chemistry students.
Laptop Users: FULL 2011 Chemistry Reference Table
Smartphone Phone Users: 2011 Chemistry Reference Table in a mobile friendly format (HTML5 version)
*If a page on the Reference Table appears sideways, click the button on the document that looks like the one to the left in order to rotate the document until it appears the correct direction for you.