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Since nonmetals rarely lose electrons in chemical reactions because their ionization energies are too high, can a nonmetal atom get enough electrons to complete its valence shell and form an anion? And does that mean that would it correspond with the configuration of the next noble gas?
Yes, because nonmetals have a higher electronegativity they are more likely to attract and gain electrons in order to achieve a full octet. For example, the halogens are more likely to gain 1 electron than to lose the 7 electrons that they already have. By gaining that 1 electron, they achieve the electron configuration of the noble gases.
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