1. How cations are formed
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Cations form when an atom loses one or more electrons. The resulting cation has the electron configuration of the noble gas atom in the row above it in the periodic table.
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Cations are the positive ions formed by the loss of one or more electrons. The most commonly formed cations of the representative elements are those that involve the loss of all of the valence electrons. ... Upon losing that electron, the sodium ion now has an octet of electrons from the second principal energy level.
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