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Jan 12, 2021 · Both atomic mass and mass number reflect the number of protons and neutrons in a sample. The difference is that atomic mass on the periodic table is the average mass of all the isotopes of a naturally-occurring sample of an element.
Aug 29, 2024 · The difference between atomic mass and mass number is that one is the weight of an element while the other is the number of nucleons in the nucleus.
Differentiate between atomic number and mass number ; Define isotopes ; Compare characteristics of varying isotopes ; Define the atomic mass unit ; Convert between amu’s and grams
The mass number is different for each isotope of a given chemical element, and the difference between the mass number and the atomic number Z gives the number of neutrons (N) in the nucleus: N = A − Z. [2] The mass number is written either after the element name or as a superscript to the left of an element's symbol.
Sep 19, 2024 · The mass number is the total number of protons and neutrons present inside the nucleus of an atom. It represents the mass of the atom. Mass number = Number of protons + Number of neutrons. Example: A carbon atom with 6 protons and 6 neutrons will have a mass number of 12.
The mass of an atom is mostly localized to the nucleus. Because an electron has negligible mass relative to that of a proton or a neutron, the mass number is calculated by the sum of the number of protons and neutrons. Each proton and neutron's mass is approximately one atomic mass unit (AMU).
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Key fact. The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different. mass numbers. , but they can be the same. For example,...
