What is the mass of an atom that has 4 protons, 5 neutrons and 4 electrons? 5 8 9 13

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asked Jul 1, 2017 7.8k views

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Ggael · Answer 1 · 2017-07-06T03:39:33+0000

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.

What is the mass of an atom that has 4 protons, 5 neutrons and 4 electrons? 5 8 9 13

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