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Oxyanions

Oxyanions. Monatomic Ion. An ion formed from only one element. Polyatomic Ion. An ion made up of two or more atoms bonded together that acts as a single unit with a net charge. Oxyanion. A polyatomic ion composed of an element, usually a nonmetal, bonded to one or more oxygen atoms.

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Oxyanions

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  1. Oxyanions

  2. Monatomic Ion An ion formed from only one element

  3. Polyatomic Ion An ion made up of two or more atoms bonded together that acts as a single unit with a net charge.

  4. Oxyanion A polyatomic ion composed of an element, usually a nonmetal, bonded to one or more oxygen atoms.

  5. NO3-1 Nitrate IonSO4-2 Sulfate IonClO3-1 Chlorate IonBO3-3 Borate IonSiO4-4 Silicate IonPO4-3 Phosphate Ion

  6. IO3-1 IodateBrO3-1 BromateMnO3-1 ManaganateCrO4-2 ChromateAsO4-3 Arsenate

  7. Naming of Oxyanion • Then end with –ate instead of –ide • If ion has less oxygen atoms then end with –ite instead of –ide • If ion has more oxygen atoms then add prefix per-

  8. Example of Naming • NO3- = Nitrate • NO2- = Nitrite • NO4- = Pernitrate

  9. -ate The suffix used when naming an Oxyanion. It contains the most common number of oxygen atoms. Ex: Nitrate (NO3-1)

  10. -ite The suffix used when naming an oxyanion with one less oxygen atom than the norm. Ex: Nitrite (NO2-1)

  11. Per- The prefix used when naming an oxyanion with one more oxygen atom than the norm Ex: Pernitrate (NO4-1)

  12. Hypo- The prefix used when naming an oxyanion with one less oxygen than the –ite. Ex: Hyponitrite (NO-1)

  13. -ic Suffix used for acids that were derived from the –ate form of the ion. Ex: Nitric Acid (HNO3)

  14. -ous Suffix used for acids that were derived from the –ite form of the ion. Ex: Nitrous Acid (HNO2)

  15. Hydro-, -ic Prefix and suffix used for acids that were derived from ion with no oxygen. Ex: Hydrochloric Acid (HCl)

  16. For compounds with three types of elements, sometimes you can place the name of the first element and name the ones left using the same method.Ex: NaNO3 Sodium Nitrate

  17. If parentheses are present then name as before, just remember that everything in the parentheses go together.Ex:Ca(NO3)2Calcium Nitrate

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