atomic number
noun/əˌtɒmɪk ˈnʌmbə(r)/
/əˌtɑːmɪk ˈnʌmbər/
(chemistry)- the number of protons in the nucleus (= centre) of an atom of a particular chemical element. Elements are placed in the periodic table according to their atomic numbers.Topics Physics and chemistryc2
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atomic number