Write note on VALENCY with example:
Write chemical formula according to it's valency:
(1) Mg & O (2) Al & Cl (3) H & S (4) Ca & F (5) K & O
Write chemical formula and chemical name according to it's valency
(1) Magnesium & Carbonate lon
(2) Hydrogen & Sulfate Ion
(3) Sodium & Chloride lon
(4) Calcium & Hydroxide Ion
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