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What Is Fajan's rule? Discuss. |
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Answer» SOLUTION :As we know, a metal combine with a nonmetal through ionic bond. The compounds so formed are called ionic compounds. A compound is said to be ionic when the charge of the cation and anion are COMPLETELY separated. But in 1923, Kazimierz Fajans found, through his X-Ray Crystallographic studies, that some of the ionic compounds show COVALENT character. Based on this, he formulated a SET rules to predict whether a chemical bond is ionic or covalent. Fajan.s rules are formulated by considering the charge of the cation and the relative size of the cation and anion. . When the size of the cation is small and that of anion is LARGE, the bond is of more covalent character. . Greater the charge of the cation, greater will be the covalent character. |
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