mass number

created by CentrX

(thing) by CentrX (6.1 mon) (print) ? I like it! Sat Sep 30 2000 at 20:05:15

In physics and chemistry, the number of neutrons and protons (nucleons) in the nucleus of an atom. For example, carbon-14 has a mass number of 14 because it has 6 protons and 8 neutrons. The approximate mass of a given nucleus is obtained by multiplying the mass number by one atomic mass unit.

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