What is atomic number, nucleons and mass number ? Give relation between them.
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The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains. In other words, the number of neutrons in any atom is its mass number minus its atomic number.
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The mass number (symbol A, from the German word Atomgewicht [atomic weight]), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus. ... The mass number is different for each different isotope of a chemical element.
Explanation:
suppose a element sodium(Na)....
in preditable......it situated in no. 11. so the atomic no 11 and the mass of nucleus is called mass no. like Na has mass 22
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