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defon
3 years ago
15

An element has 4 protons, 5 neutrons, and 4 electrons. What is the atomic mass of the element

Physics
1 answer:
vfiekz [6]3 years ago
7 0
Beryllium: mass number of an atom = number of neutron + number of proton in the nucleus = 5+4=9
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<h3>Potential energy of a system of magnetic dipole</h3>

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