give reasons why chemical formula of magnesium chloride is MgCl2 but magnesium oxide is MgO
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Because Mg is 2+ and Cl is 1- whereas O is 2- .
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Explanation: kyu ki chlorine ko sirf 1 electron chahiye khud ko stable karne k liye so clorine k outer shell ka sirf 1 electron reaction me participate karta hai.... And oxygen k 2 electron reaction me participate karte hain.... So magnesium chlorine se react kar k MgCl2 form karta hai or oxygen se react kar k MgO banata hai....
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