what are the ions present in these compounds
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The ions present in Na2O are sodium ions 2Na+ and oxide ion O2-. The ions present in MgO are magnesium ion Mg2+ and oxide ion O2-.
Explanation:
An ion is an atom or group of atoms that has an unequal number of electrons and protons. This causes an electric charge in the ion.
There are two types of ions – cation and anion. An atom which lacks electrons is called a cation. And If the number of electrons is greater than that of protons, then the ion has -ve charge and is also called an anion.
The ions in the given compounds are mentioned above with their respective +ve and -charges.
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