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Naming Compounds
Oxidation Numbers Each Sodium atom gives up 1 electron, so 2 Sodium atoms (Na 2) will give up 2 electrons and have a charge of 2+. Losing 1 electron Gaining 1 electron An ionic bond The Symbols Ionic Compounds Mg 2+ F1-The number of electron arrows comes from the oxidation numbers. Positives give electrons; negatives receive.
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SCPS Chemistry Worksheet – Periodicity
www.currituck.k12.nc.us980 of your text book defines oxidation number as the positive or negative charge of a monatomic (one atom) ion. These numbers may be confirmed on many of the websites you have used Calcium will have a 2+ oxidation number as it tends to easily lose its 2 valence electrons, the 4s2 electrons 4.