Part C. A certain element forms an ion with 18 electrons and a charge of +2. Identify the element.
Express your answer as a chemical symbol.
A main group metal tends to lose electrons, forming a cation with the same number of electrons as the nearest noble gas in the periodic table. A main group nonmetal tends to gain electrons, forming an anion with the same number of electrons as the nearest noble gas. The various groups gain or lose electrons as summarized in the following table:
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