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Unformatted text preview: Why do metals want to lose electrons and nonmetals want to gain electrons? Elements in the s and p blocks want to attain an octet of electrons and look like noble gases. This is a very stable configuration. Ionic Radius: the radius of a cation or anion. Measured in picometers (pm). Cations become smaller Anions become larger Conclusions: Electronegativity how well does an atom pull electrons to itself in a bond? o Increases across the period o Decreases down a group Electron affinity is the amount of energy released when an atom gains an electron Ionic radius how big is the ion? o Cations get smaller o Anions get bigger...
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