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20 November, 14:34

How many protons are in the nuclues of an atom of beryllium?

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  1. 20 November, 15:24
    0
    Top number is mass number = protons + neutrons is my answer also
  2. 20 November, 17:58
    0
    Look at your periodic

    Table. There are two numbers next to each element. Top number is mass number = protons + neutrons

    Atomic number = number if protons
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