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Directory Sites
Overview and basic data.
www.britannica.com
Numeric data, uses, and general information.
www.c-f-c.com
Basic physical and historical information.
education.jlab.org
Basic information, atomic structure, and table of isotopes.
www.chemicalelements.com
Data tables and historic information.
www.scescape.net
General and physical information, uses, key isotopes, and ionisation energies.
www.chemsoc.org
EnvironmentalChemistry.com: Argon
Atomic structure, chemical and physical properties, and table of nuclides.
environmentalchemistry.com
Extensive information on history, uses, occurrence, and properties of the element.
www.webelements.com
Physical data, chemical properties, health and environmental effects.
www.lenntech.com
Details the properties of the element, including its history, applications, and characteristics.
en.wikipedia.org
Sources, properties, isotopes, and uses.
periodic.lanl.gov
Electronic, thermal, and steric data along with basic information.
partisans.spurious.biz