Calcium is a chemical element with symbol Ca and atomic number 20. Calcium is
a soft gray ...... Tokyo, Japan: The International Technical Information Institute.
Element Calcium (Ca), Group 2, Atomic Number 20, s-block, Mass 40.078.
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Name: Calcium Symbol: Ca Atomic Number: 20. Atomic Mass: 40.078 amu.
Melting Point: 839.0 °C (1112.15 K, 1542.2 °F)
Extensive information on history, uses, occurrence, compounds, and properties of
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Calcium's properties, discovery, videos, images, states, energies, ... (Berzelius,
the great Swedish chemist, exchanged a great deal of information with Davy.
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Calcium is a chemical element with the symbol Ca and an atomic number of 20.
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History. From the Latin word calx, lime. Though lime was prepared by the
Romans in the first century under the name calx, the metal was not discovered