the mass of an atom is due to the assembly of
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proton and neutron
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The mass of an atom is due to the assembly of protons and neutrons.
Explanation:
- The mass of an atom is determined by the mass of its nucleus, which consists of protons and neutrons grouped together as nucleons.
- An element's atomic mass is the average mass of its atoms measured in atomic mass unit (amu, also known as daltons, D).
- The atomic mass is a weighted average of all of the isotopes of that element, calculated by multiplying the mass of each isotope by its abundance.
- Protons and neutrons are the fundamental particles whose masses account for the majority of an atom's mass.
- Neutrons and protons, collectively known as nucleons, are bound together in an atom's dense inner core, the nucleus, where they account for 99.9 percent of the atom's mass.
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