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An isotope of sodium (Na) has a mass number of 22 it have 11 neutrons
Isotopes are members of a family of an element that all have the same number of protons but different numbers of neutrons. protons are the positively charged particles which are present in the nucleus of an atom. a neutron is a subatomic particle found in the nucleus of every atom except that of simple hydrogen. here sodium (Na) has a mass number of 22 so, in that sodium 11 proton are present and 11 neutron are present.
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