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Question
(a) Write the symbols/formulae of two simple ions and two compound ions (or polyatomic ions).
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Solution
(a) Example of a simple ion: Iodine atom forms an iodide ion by accepting an electron, I-. Similarly, magnesium loses two electrons to form a magnesium ion, Mg2+.
Example of a compound ion: Carbonate ion, CO32-, is made up of two types of atoms i.e. carbon and oxygen (chemically bonded). Similarly, ammonium ion, NH4+, is made up of two types of atoms i.e. nitrogen and hydrogen (chemically bonded).
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