Magnesium oxide in Criss cross method
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To find the formula for magnesium oxide: The oxidation number of Mg is +2 and oxygen is -2. Crisscross the absolute values to give Mg2O. In this example there is a common factor of 2 so divide by 2 to give MgO.
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The Thorpe's Crisscross method is a method of finding out the chemical formula of a metal and non-metal that combine to form an ionic bond created by high school chemistry teacher Kim Thorpe. ... To find the formula for magnesium oxide: The oxidation number of Mg is +2 and oxygen is -2.
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