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Brellium Essay title: Brellium Be Protons = 4 Electrons = 4 Atomic # = 4 Neutrons = 5 Atomic mass = 9
Brellium Essay title: Brellium Be Protons = 4 Electrons = 4 Atomic # = 4 Neutrons = 5 Atomic mass = 9
Econ AP Essay Preview: Econ AP Report this essay Atoms Smallest unit of matter Made of protons electrons and neutrons Has protons and neutrons packed together in a nucleus The electrons orbit around Atomic number Written as a subscript next to the symbol of an element Number of protons (and hence number of electrons) of.