mass number
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
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
Since an element’s isotopes will have slightly different mass numbers, scientists also determine the atomic mass, which is the calculated mean of the mass number for its naturally occurring isotopes.
From Textbooks • Jun. 9, 2022
This approximation of mass can be used to easily calculate how many neutrons an element has by simply subtracting the number of protons from the mass number.
From Textbooks • Jun. 9, 2022
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.
