Wrte the molecular formula of magnesium ii acetate
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Magnesium oxide is a compound with a metal and a nonmetal. To determine the molecular formula, you need to determine the ions each forms, then determine an electrically neutral formula.
Magnesium is an alkali earth metal and forms an ion with a 2+ charge, Mg2+. Oxygen is a nonmetal in group 16, or 6A (in the old column numbering system) of the periodic table. It forms an ion with a 2- charge, O2-.
So you have Mg2+ and O2-. The charges are equal but opposite, so one Mg2+ paired with one O2- will create an electrically neutral compound, MgO. The convention is to always place the positively charged element (cation) on the left and the negatively charged element (anion) on the right.
A general method for determining compound formulas is the criss-cross method. Using this method, you take the charge on the cation and make it the subscript on the anion; then take the charge on the anion and make it the subscript on the cation. Subscripts are always positive numbers. A final step (if needed) is to reduce the subscripts to the lowest value possible. Using this method, you would get Mg2O2 and then reduce it to MgO.
Magnesium is an alkali earth metal and forms an ion with a 2+ charge, Mg2+. Oxygen is a nonmetal in group 16, or 6A (in the old column numbering system) of the periodic table. It forms an ion with a 2- charge, O2-.
So you have Mg2+ and O2-. The charges are equal but opposite, so one Mg2+ paired with one O2- will create an electrically neutral compound, MgO. The convention is to always place the positively charged element (cation) on the left and the negatively charged element (anion) on the right.
A general method for determining compound formulas is the criss-cross method. Using this method, you take the charge on the cation and make it the subscript on the anion; then take the charge on the anion and make it the subscript on the cation. Subscripts are always positive numbers. A final step (if needed) is to reduce the subscripts to the lowest value possible. Using this method, you would get Mg2O2 and then reduce it to MgO.
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