bonnie127 bonnie127
  • 11-10-2016
  • Chemistry
contestada

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

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pm12 pm12
  • 11-10-2016
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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Johannes02
Johannes02 Johannes02
  • 11-10-2016
Top number is mass number= protons+ neutrons  is my answer also
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