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Which is the most accurate statement?
Atomic Mass
The mass of an atom expressed in atomic mass units (amu), essentially equivalent to the number of protons and neutrons in the nucleus.
Atom
The basic unit of a chemical element, consisting of a nucleus of protons and neutrons, with electrons orbiting the nucleus.
Amu
Atomic Mass Unit, a standard unit of mass that quantifies mass on an atomic or molecular scale.
Valence Electrons
Electrons in the outermost shell of an atom that are available for bonding with other atoms.
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