CHEMICAL ELEMENTS

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.
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Molybdenum

Molybdenum, a hard, silvery, metallic element. It is insoluble in most acids, and does not react with air at ordinary temperatures.

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  • Zirconium

    Zirconium

    Zirconium, a metallic element that occurs as a hard, gray, crystalline substance and as a noncrystalline blue-black powder. See more »

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