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13 April, 22:30

What element with a mass number of 100 has 56 neutrons in its nucleus?

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  1. 14 April, 01:44
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    Barium - Ba

    Barium is a chemical element with the symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Because of its high chemical reactivity, barium is never found in nature as a free element.

    Symbol: Ba

    Atomic mass: 137.327 u

    Electron configuration: [Xe] 6s2

    Atomic number: 56

    Van der Waals radius: 268 pm

    Discoverers: Humphry Davy, Carl Wilhelm Scheele
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