American Chemical Society
Middle School Chemistry: Periodic Table
Students explore the periodic table and learn the basic information given for elements: the name, symbol, atomic number, and atomic mass for each element.
OpenStax
Open Stax: Elements and Atoms, the Building Blocks of Matter
This site provides an overview of elements and atoms, the building blocks of matter.
Science Struck
Science Struck: List of Radioactive Elements
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.
Science Struck
Science Struck: Periodic Table With Atomic Mass
Explains how Dmitri Mendeleev created the periodic table of elements, how it was organized, the changes made by Henry Moseley in 1931, some characteristics of element groups, and what the atomic mass, number, and abbreviation each...
Mocomi & Anibrain Digital Technologies
Mocomi: Structure of an Atom
An atom is made of three parts - protons, neutrons, and electrons. Here you can explore these different parts.