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Which is the best definition of mass number?

Definition of mass number : an integer that approximates the mass of an isotope and designates the number of nucleons in the nucleus : an integer that approximates the mass of an isotope and that designates the number of nucleons in the nucleus the symbol for carbon of mass number 14 is 14C or C 14 — compare atomic mass

What is the mass number of an atom?

mass number. The total number of protons and neutrons in the nucleus of an atom. For example, nitrogen has 7 protons and 7 neutrons in its nucleus, giving it a mass number of 14.

Why are atomic numbers and mass numbers always whole numbers?

Atomic number and mass number are always whole numbers because they are obtained by counting whole objects (protons, neutrons, and electrons). The sum of the mass number and the atomic number for an atom (A-Z) corresponds to the total number of subatomic particles present in the atom.

What is the legal definition of the word mass?

mass. adjective. Legal Definition of mass (Entry 2 of 2) : participated in by or affecting a large number of individuals mass insurance underwriting mass tort litigation. Keep scrolling for more. Comments on mass.


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