1. 1  the âIâ or self of any person; a person as thinking, feeling, and willing, and distinguishing itself from the selves of others and from objects of its thought.
The largest atomic mass for an artificial element (or any element) would be Ununoctium. Neutronâ¦ stars, which are neutrons densely packed together surrounded by a thin layer of degenerate matter could possibly be considered atomic nuclei, though their specific proton count would probably not be measurable.
Atomic mass. The atomic mass (ma) is the mass of an atom. Its unit is the unified atomic mass units (symbol: u, or Da) where 1 unified atomic mass unit is defined as 1â12 of the mass of a single carbon-12 atom, at rest.