Assertion: beryllium's neutron | /r/HasProperty | 5 electron shells
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text: 4 Neutrons in most abundant isotope: 5 Electron shells: 2,2 Electron configuration: 1s2 2s2 Density @ 20oC: 1.848 g/cm3 Show more, including: Heats, Energies, Oxidation, Reactions,