What do you understand by given terms? Give at least 4 examples
Ion

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Solution

An ion is an atom or group of atoms where the number of electrons is not equal to the number of protons.
That means when a stable atom gains or loses an electron, it becomes an ion.
Examples of ions are as follows: $H^{+}, {Na}^{+}, {Ca}^{2 +}, F^{-}, O^{2 -}$ .

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