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Why does the nucleus of an atom have less mass than the sum of its ...


Why does the nucleus of an atom have less mass than the sum of its protons and ... You have been taught that a nucleus is made up of protons and neutrons.


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Do protons and neutrons in nucleus have the same mass as when ...


I try to address this question in Philip Freeman's answer to Why does the nucleus of an atom have less mass than the sum of its protons and neutrons?


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I found an answer from en.wikipedia.org

Nuclear binding energy - Wikipedia


Nuclear binding energy is the minimum energy that would be required to disassemble the nucleus of an atom into its component parts. These component parts are neutrons and protons, which are collectively ... The mass of an atomic nucleus is less than the sum of the individual masses of the free constituent protons and ...


For more information, see Nuclear binding energy - Wikipedia

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I found an answer from en.wikipedia.org

Atomic mass - Wikipedia


The atomic mass (ma) is the mass of an atom. Its unit is the unified atomic mass units (abbr. u) where 1 unified atomic mass unit is defined as ​1⁄12 of the mass of a single carbon-12 atom, at rest. For atoms, the protons and neutrons of the nucleus account for nearly all of the total mass, ... The atomic mass of atoms, ions , or atomic nuclei is slightly less than the sum ...


For more information, see Atomic mass - Wikipedia

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I found an answer from www.britannica.com

Atomic mass | physics | Britannica.com


The number of neutrons in a nucleus affects the mass of the atom but not its chemical properties. Thus,… The observed atomic mass is slightly less than the sum of the masses of the protons, neutrons, and electrons that make up the atom.


For more information, see Atomic mass | physics | Britannica.com

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I found an answer from www.reddit.com

Why does a Helium nucleus have less mass than the mass of two ...


Edit: Your error was assuming that since an alpha particle is made out two protons and two neutrons that it would weigh the same as the sum of ...


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I found an answer from physics.stackexchange.com

particle physics - Does the nucleus have less inertial mass than sum ...


In a word, yes. The nucleus has less mass (rest energy) than the sum of its protons and neutrons. The difference between these two quantities ...


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I found an answer from physics.stackexchange.com

nuclear physics - Why mass of nucleus decreases after binding of it's ...


Now the nucleus has a lesser mass then the sum of its constituents. ... same as the energy that is binding the nucleus together (protons and neutrons). ... The second frame is the frame of atoms molecules particles, a micro frame ... of the nuclei that make up the nucleus has a total mass less than the sum of ...


For more information, see nuclear physics - Why mass of nucleus decreases after binding of it's ...