nucleus with the 4 proton and 5 neutrons
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The atomic mass:8:Beryllium
Beryllium; the stable isotope is the one that contains 4 protons and 5 neutrons.
Beryllium; the stable isotope is the one that contains 4 protons and 5 neutrons.
tony19:
Atomic mass is 9 and not 8
beryllium-9 is the isotope.
No
9 is the real mass of Be
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