mass number
Example Sentences
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As an example, the masses and radii of all nuclei up to mass number 50 were calculated using this method.
From Science Daily • May 15, 2024
Note that the small contribution of mass from electrons is disregarded in calculating the mass number.
From Textbooks • Jun. 9, 2022
If the atomic number and the mass number of all but one of the particles in a nuclear reaction are known, we can identify the particle by balancing the reaction.
From Textbooks • Feb. 14, 2019
The mass number, or atomic mass, is the number of protons plus the number of neutrons of that element.
From Textbooks • Apr. 25, 2013
This gives off alpha particles at such a rate that half of it has decomposed in 150 days, leaving plutonium with atomic number 94 and mass number 238.
From A Brief History of Element Discovery, Synthesis, and Analysis by Watson, Glen W.
