Featured Article: How Aluminum Works
Once considered a semiprecious metal alongside gold and silver, aluminum pretty much languished in obscurity until the 19th century. How did the metal become so ubiquitous? See more »
chemical elements library
Chemical elements are substances composed of only one type of atom and they cannot be broken down further. Chemical elements are the simplest forms of matter and each one is assigned a specific atomic number. Check out these articles on chemical elements.
How Aluminum Works
Once considered a semiprecious metal alongside gold and silver, aluminum pretty much languished in obscurity until the 19th century. How did the metal become so ubiquitous?
See more »
How Gold Works
We love it. We wear it glittering around our necks and sparkling at our ears, wrists and feet. We pass it down to our children and hoard it in secret stashes. Why is this precious metal so prized?
See more »Actinide Elements
Actinide Elements, or Actinides, a series of 15 chemical elements (atomic numbers 89 through 103).
See more »Actinium
Actinium, a radioactive chemical element that occurs in nature in trace amounts as a result of the radioactive decay of uranium and thorium.
See more »Americium
Americium, a radioactive chemical element. In pure form, it is a silvery metal. Americium does not occur in nature; it is artificially created.
See more »Antimony
Antimony, a chemical element. It exists in two forms, one metallic and one nonmetallic.
See more »Argon
Argon, a chemical element that is a colorless, odorless, tasteless gas at ordinary temperatures and pressures.
See more »Arsenic
Arsenic, a chemical element. It can exist in several forms; these include metallic (or gray) arsenic and amorphous (or black) arsenic.
See more »Astatine
Astatine, a radioactive chemical element. Astatine, a member of the halogen group of elements, is an extremely shortlived substance; its most stable isotope has a half-life period of only 8.3 hours.
See more »Barium
Barium, a soft, silvery-white, metallic element of the alkaline-earth group, related to calcium.
See more »Berkelium
Berkelium, a radioactive, metallic chemical element. Berkelium does not occur in nature; it is artificially created.
See more »Beryllium
Beryllium, a grayish-white metallic chemical element, formerly called glucinum, or glucinium.
See more »Bismuth
Bismuth, a metallic chemical element. It is brittle, has a high luster, and is grayish-white with a red or pink tinge.
See more »Boron
Boron, a nonmetallic chemical element never found free in nature. It occurs in various compounds, including boric acid and borax.
See more »Bromine
Bromine, a chemical element. It is a heavy, reddish-brown liquid with a choking odor.
See more »Cadmium
Cadmium, a soft, silvery-white metallic element. It is much like zinc, but is a heavier metal with a lower melting point.
See more »Calcium
Calcium, a soft, silver-white metallic chemical element. Calcium is malleable (can be hammered or rolled into a thin sheet) and ductile (can be drawn into wire), and can combine with many other metals to form alloys.
See more »Californium
Californium, a radioactive, metallic chemical element. Californium does not occur in nature; it is produced artificially.
See more »Cesium
Cesium, a silver-white metallic chemical element. Cesium is softer than talc, is ductile (can be drawn into wire), and has a low melting point.
See more »Chlorine
Chlorine, a chemical element that is a greenish-yellow gas at ordinary temperatures and pressures.
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