how do you determine if the atom is a neutral atom or an ion and if the atom is an isotope or not?
It is neutral if the number of protons in the nucleus = the number of electrons in the outside shells. More or fewer electrons means it is an ion. An isotope is differentiated by the number of neutrons in the nucleus. Isotopes have different number of neutrons but the same number of protons and electrons.
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ion is the number of electron change and isotope is the number of neutron change
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