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The charge on the Sc ions in Sc2O3 is 3+. This can be determined by recognizing that oxide ions always have a charge of 2-, and there are three of them, so the total oxide charge is 6-. There are two scandium ions, and since the compound must be neutral, the total charge on the two scandium ions has to be 6+, so the charge on each scandium ion is 3+.

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Is Sc2O3 a molecular compound?

No, Sc2O3 is an ionic compound, not a molecular compound. It is composed of scandium ions (Sc3+) and oxide ions (O2-), which are held together by ionic bonds.


Is Sc2O3 a covalent compound or an ionic compound?

Sc2O3 is an ionic compound. It is composed of Scandium (Sc) which is a metal, and Oxygen (O) which is a non-metal. In ionic compounds, metals donate electrons to non-metals to form charged ions that are held together by electrostatic forces.


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Scandium has the chemical symbol Sc and 21 is it's atomic number. A link is provided to the Wikipedia article on this (usually considered) rare earth element.


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