Royal Society of Chemistry
Royal Society of Chemistry: Periodic Table/helium
A great source of information on helium. Exceptionally thorough and well written.
PBS
Pbs Learning Media: Pyrotechnics: It's Elemental
In this interactive periodic table from the NOVA Web site, find out the role of various elements in making fireworks.
Encyclopedia of Earth
Encyclopedia of Earth: Zirconium
Information about the element Zirconium, atomic number 40. Covers history of its discovery, sources, physical properties, atomic properties, how abundant it is on the Earth, details about permissible exposure, uses, and possible...
Encyclopedia of Earth
Encyclopedia of Earth: Ytterbium
Information about the element, Ytterbium, atomic number 70. Covers physical properties, atomic properties, how abundant it is on the Earth, and details about health-related regulations.
Encyclopedia of Earth
Encyclopedia of Earth: Vanadium
Information about the element, Vanadium, atomic number 23. Covers its history, sources, physical and atomic properties, prevalence on the Earth, details about any health-related regulations, uses, and possible substitutes.
Encyclopedia of Earth
Encyclopedia of Earth: Uranium
Information about the radioactive element, Uranium, atomic number 92. Describes its history, physical and atomic properties, how abundant it is on the Earth, and permissible exposure limits. Also discusses sources, uses, isotopes,...
Encyclopedia of Earth
Encyclopedia of Earth: Titanium
Information about the element, Titanium, atomic number 22. Covers its initial discovery, physical properties, atomic properties, how abundant it is on the Earth, and details about health-related regulations. Also discusses sources, uses,...
Encyclopedia of Earth
Encyclopedia of Earth: Thulium
Information about the element, Thulium, atomic number 69. Covers physical properties, atomic properties, how abundant it is on the Earth, and details about health-related regulations.
Encyclopedia of Earth
Encyclopedia of Earth: Thorium
Information about the element, Thorium, atomic number 90. Covers physical properties, atomic properties, how abundant it is on the Earth, where it is found, and details about health-related regulations. Discusses thorium's potential use...
Encyclopedia of Earth
Encyclopedia of Earth: Tantalum
A description of the element, Tantalum, atomic number 73. Covers the origin of its name, sources, uses for it in industry, and possible substitutes.
Encyclopedia of Earth
Encyclopedia of Earth: Strontium
Information about the element, Strontium, atomic number 38. Covers its history, sources, physical properties, atomic properties, how abundant it is on the Earth, details about permissible exposure, uses, and possible substitutes.
Encyclopedia of Earth
Encyclopedia of Earth: Silver
Information about the element, Silver, atomic number 47. Covers physical properties, atomic properties, how abundant it is on the Earth, and details about health-related regulations and effects from exposure to it. Also discusses...
Encyclopedia of Earth
Encyclopedia of Earth: Silicon
Information about the element, Silicon, atomic number 14. Covers physical properties, atomic properties, how abundant it is on the Earth, and details about health-related regulations. Also discusses sources of Silicon, and its many...
Encyclopedia of Earth
Encyclopedia of Earth: Scandium
Information about the element, Scandium, atomic number 21. Covers physical properties, atomic properties, how abundant it is on the Earth and where it is found, and details about any impact on human health.
Encyclopedia of Earth
Encyclopedia of Earth: Rubidium
Information about the element, Rubidium, atomic number 37. Covers physical properties, atomic properties, how abundant it is on the Earth, and details about health-related regulations.
Encyclopedia of Earth
Encyclopedia of Earth: Rhenium
Information about the metallic element, Rhenium, atomic number 75. Covers its physical and atomic properties, how abundant it is on the Earth, sources, uses, and potential substitutes.
Encyclopedia of Earth
Encyclopedia of Earth: Radon
Information about the radioactive element, Radon, atomic number 86. Covers physical properties, atomic properties, how abundant it is on the Earth, details about its impact on human health, and about how it can be monitored.
Encyclopedia of Earth
Encyclopedia of Earth: Radium
Information about the radioactive element, Radium, atomic number 88. Covers physical and atomic properties, how abundant it is on the Earth, and permissible exposure limits.
Encyclopedia of Earth
Encyclopedia of Earth: Potassium
Basic information about the element Potassium, atomic number 19. Covers its history, physical and atomic properties, and how abundant it is on the Earth.
Encyclopedia of Earth
Encyclopedia of Earth: Plutonium
Information about the element, Plutonium, atomic number 94. Covers physical properties, atomic properties, how abundant it is on the Earth, and details about health-related regulations. Discusses reactor- and weapons-grade plutonium, and...
Encyclopedia of Earth
Encyclopedia of Earth: Platinum
Information about the element, Platinum, atomic number 78. Covers its physical and atomic properties, how abundant it is on the Earth, sources, uses, potential substitutes, and permissible exposure limits.
Encyclopedia of Earth
Encyclopedia of Earth: Oxygen
Information about the element, Oxygen, atomic number 8. Covers history, physical and atomic properties, abundance, and permissible exposure limits. Also discusses forms of oxygen, isotopes, sources, and uses.
Encyclopedia of Earth
Encyclopedia of Earth: Nitrogen
Information about the element, Nitrogen, atomic number 14. Covers common chemical transformations, its physical properties, atomic properties, how abundant it is on the Earth, and details about health-related regulations. Also discusses...
Encyclopedia of Earth
Encyclopedia of Earth: Molybdenum
Information about the metallic element, Molybdenum, atomic number 42. It is unique in having an extremely high melting point. Covers its discovery, its biological importance, its physical and atomic properties, how abundant it is on the...