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.



Radium, a highly radioactive, brilliant-white metallic element that is produced by the natural disintegration of another element, uranium.

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  • Chlorine

    Chlorine, a chemical element that is a greenish-yellow gas at ordinary temperatures and pressures. See more »

  • Chromium

    Chromium, a silvery-white metallic element. It was named from the Greek word chroma, meaning color, because of the variety of colors of chromium compounds. See more »

  • Cobalt

    Cobalt, a metallic element of the iron group. It resembles iron in appearance, but has a slight reddish tinge. See more »

  • Curium

    Curium, a radioactive metallic chemical element. Curium does not occur in nature; it is produced artificially. See more »

  • Einsteinium

    Einsteinium, a radioactive metallic chemical element. Einsteinium is man-made and does not occur naturally on earth. See more »

  • Element Palladium
    Element Palladium

    Palladium, a soft, white, metallic element belonging to the platinum group of metals. See more »

  • Fermium

    Fermium, a radioactive, metallic chemical element. Fermium does not occur in nature; it is produced artificially in trace amounts. See more »

  • Francium

    Francium, a chemical element with the properties of an alkali metal. It occurs only in radioactive forms, produced in nature by the disintegration of actinium. See more »

  • Gallium

    Gallium, a chemical element. In its solid form, gallium is a bluish-gray metal; as a liquid, it resembles mercury. See more »

  • Germanium

    Germanium, a metallic chemical element. It is brittle, lustrous, and silver-gray at ordinary temperatures. See more »

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