ALL meanings of mass number
mass num·ber
M m - noun mass number the integer nearest in value to the atomic weight of an atom and equal to the number of nucleons in the nucleus of the atom. Symbol: A. 1
- noun mass number quantity of protons, neutrons in an atom 1
- noun mass number (physics) The total number of protons and neutrons in an atomic nucleus. 0
- noun mass number the total number of neutrons and protons in the nucleus of a particular atom 0
- noun mass number the number of neutrons and protons in the nucleus of an atom: the approximate mass of a given nucleus is obtained by multiplying the mass number by the fundamental unit of mass, 1.6605 × 10-24 grams (1⁄12 the mass of C12 atom) 0