jordInOchloergy jordInOchloergy
  • 27-10-2016
  • Biology
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what is the mass of an atom that has 4 protons, 5 neutrons and 4 electrons? 5 8 9 13

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sia4 sia4
  • 27-10-2016
The element with atomic number 4 is Berilium and its atomic mass is 8(4 protones +4 neutrons) and is placed in the second period and II A group.This element shows Valency 2. In other means the answer you are looking for is 8.
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