Royal Society of Chemistry
Chemical Society: Chlorine
A concise summary of some of the most fundamental information on chlorine.
Encyclopedia of Earth
Encyclopedia of Earth: Chlorine
Information about the element, Chlorine, atomic number 17. Covers physical properties, atomic properties, how abundant it is on the Earth, and details about health-related regulations.
Other
Web ref.org: Chlorine
A few well done paragraphs on chlorine, with descriptions of the element and its properties. One nice feature is that any technical term has a link to help you better understand it.
Chemicool
Chemicool: Chlorine
A very well organized set of data tables with just about all the basic information on chlorine and its properties that a student could ever want.
Chem4kids
Chem4 Kids: Chlorine (Cl)
The 17th element in the periodic table is defined, chlorine. Find out how many electrons chlorine has and where you can find it in nature and in the home.
Science Education Resource Center at Carleton College
Serc: Chlorine Chemistry: A Building Block of Matter
Students investigate physical and chemical properties of several chlorine compounds such as iron chloride, calcium chloride, and sodium chloride. The students will then discover that chlorine is one of the building blocks of matter and...
TED Talks
Ted: Ted Ed: Chlorine: Periodic Table of Videos
The team at periodicvideos has created a TED-Ed Lesson for every element of the periodic table. This one is about chlorine - element number 17, an extremely reactive and dangerous gas, which was used as a weapon in World War I. [8:41]
Other
Chlorine Chemistry Division
This resource aims to promote the use and application of chlorine in a responsible manner. Tends to focus on the many positive applications and downplay and health risks associated with some chlorine compounds, but a good source of...
Other
Chlorine Institute
The website from the Chlorine Institute provides information for a trade association of companies that make chlorine products. Lots of information and references, along with a search engine for the entire site.
Web Elements
Web Elements Periodic Table: Chlorine
An excellent source of basic data, chemical and physical properties and electron dot formula information on this element.
Other
Euro Chlor
Information from a European trade group of chlorine compound manufacturers. Lots of information, all well organized.
Other
Clorox.com
The largest manufacturer of chlorine bleach shares lots of information about its products.
Other
Reach for Unbleached
A Canadian group that works to stop the use of chlorine compounds for bleaching in the paper industry. Interesting, but with a definite bias.
Ducksters
Ducksters: Chemistry for Kids: Elements: Chlorine
On this site, learn about chlorine's properties and characteristics. Kids can also learn about its chemistry including atomic weight, atom, uses, sources, name, and discovery.
Science Struck
Science Struck: Uses of Chlorine
Describes the basic properties of chlorine and lists examples of how it is used in water treatment, medicine, industry, and inside the human body.
Science Struck
Science Struck: Bromine vs. Chlorine
Compares the properties and uses of bromine and chlorine.
Science4Fun
Science4 Fun: Chlorine
Read fun facts and details about the element Chlorine, while learning about its characteristics, properties, uses, discovery, and where it is found.