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प्रश्न
What is an ion? Explain with examples?
उत्तर
An electrically-charged atom (or group of atoms) is called an ion. it is formed by the loss or gain of an electron by an atom.
Ions are of two types: cations and anions.
For example: A sodium ion (Na+) is formed when a sodium atom loses one electron. A sodium ion is a cation.
A chloride ion (Cl-) is formed when a chlorine atom gains one electron. A chloride ion is an anion.
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