The halogens are five non-metallic elements found in group 17 of the periodic table. The term “halogen” means “salt-former” and compounds containing halogens are

Chem4s.com! This tutorial introduces alkali metals of the periodic table. Other sections include matter, elements, reactions, and biochemistry.

A group in the Periodic Table is any column of elements with common properties denoted by the electrons in the outermost layer. There are eight groups of elements in

Interactive periodic table. Clicking on an element brings up a list of general properties and data, and information on its discovery, history, uses, geologic

Periodic table of elements with information on chemical elements like gold, silver, iron, neon, helium, chlorine, copper, cobalt, and more

Online games. Learn about the periodic table, chemistry, the elements and more with these free online quizzes and games.

Interactive periodic table with dynamic layouts showing names, electrons, oxidation, trend visualization, orbitals, isotopes, and compound search. Full descriptions

A group or family is a vertical column in the periodic table. Groups usually have more significant periodic trends than periods and blocks, explained below.

Chem4s.com! This tutorial introduces the periodic table. Other sections include matter, elements, reactions, and biochemistry.

An up-to-date periodic table with detailed but easy to understand information