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.
the total mass of an atom, numerically equivalent to the mass in grams of 1 mole of the atom. (For element with more than one isotope, the atomic mass is the average mass of the naturally occurring isotopes, weighted by their abundance.) Isotope one of the several atomic forms of the element, each with the same number of protons but a different number of neutrons, thus differing in atomic mass.