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isotope
noun , chem one of two or more atoms of the same chemical element that contain the same number of protons but different numbers of neutrons in their nuclei and therefore have the same atomic number and chemical properties, but different mass numbers and physical properties.
[Early 20c: from iso- + Greek topos place (ie on the periodic table)]
isotopic adjective .
isotopically adverb .
isotopy noun .
noun , chem one of two or more atoms of the same chemical element that contain the same number of protons but different numbers of neutrons in their nuclei and therefore have the same atomic number and chemical properties, but different mass numbers and physical properties.
[Early 20c: from iso- + Greek topos place (ie on the periodic table)]
isotopic adjective .
isotopically adverb .
isotopy noun .
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