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Biology, 27.12.2019 22:31 northpolea
Acertain atom of helium has 2 protons and 3 neutrons in its nucleus. it has 2 electrons in its electron cloud. what is the atomic mass of this atom?
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Acertain atom of helium has 2 protons and 3 neutrons in its nucleus. it has 2 electrons in its elect...
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