We are being asked what will be the chemical formula of an ionic compound. Elements have common charges based on what group they belong to in the periodic table.
Elements gain and lose electrons so that they have the same number of electrons as the noble gases.
• Metals → lose electrons and gain positive (+) charge to become more like their closest noble gas
Write the formulas for the following ionic compounds:
a) copper bromide (containing the Cu+ ion)
b) manganese oxide (containing the Mn+3 ion)
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