Students explore the periodic table and learn the basic information given for elements: the name, symbol, atomic number, and atomic mass for each element.

This site provides an overview of elements and atoms, the building blocks of matter.

In this online biology textbook, learn about atoms and molecules as they relate to life. Find out about topics such as electrons and energy, chemical bonding, and chemical reactions.

Learn about radioactivity, the different types of radioactive decay, isotopes, and half-life of a radioactive element. Includes a long chart listing radioactive elements, atomic number and mass number, decay type, and length of half-life.