| 11. | The oxidation number of the most common chalcogen compounds with positive metals is " 2.
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| 12. | Other oxidation numbers, such as " 1 in pyrite and peroxide, do occur.
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| 13. | For oxygen ( O ) the oxidation number began as 0 and decreased to 2 ".
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| 14. | Having said all that, it is unusual to have to indicate a negative oxidation number.
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| 15. | When the metal has more than one possible ionic charge or oxidation number the name becomes ambiguous.
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| 16. | Because of this, the oxidation number of Pt does not rise above + 2.32.
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| 17. | It is possible to determine the strength of the nuclear charge by the oxidation number of the atom.
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| 18. | When methane is oxidized to carbon dioxide its oxidation number changes from " 4 to + 4.
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| 19. | But you need to actually know how to assign oxidation numbers before you can do anything else here.
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| 20. | The sum of the oxidation number of all atoms in a compound is zero . " "'
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