(a) What is an ion? Explain with examples.
(b) What is the nature of charge on (i) a cation, and (ii) an anion?
(c) Name the cation and anion present in MgCl2. Also write their symbols.
(a) An ion is an electrically charged atom (or group of atoms). It is formed by the loss or gain of an electron by an atom.
Example: Na+ is cation and Cl– is an anion.
(b)(i) Positive charge (+) for cations.
(ii) Negative charge (-) for anions.
(c) The cation present in MgCl2 is Magnesium ion, Mg2+.
The anion present in MgCl2 is Chloride ions, 2Cl–.
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