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Polyatomic Ions

Polyatomic Ions. Polyatomic Ions. A group of atoms, usually of different elements, that act as a single ion Eg: one atom of sulphur and four oxygen atoms form the polyatomic ion called sulphate, or SO 4 2-. Polyatomic Ions. Similar polyatomic ions are named using suffixes “-ate” or “-ite”

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Polyatomic Ions

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  1. Polyatomic Ions

  2. Polyatomic Ions • A group of atoms, usually of different elements, that act as a single ion • Eg: one atom of sulphur and four oxygen atoms form the polyatomic ion called sulphate, or SO42-

  3. Polyatomic Ions • Similar polyatomic ions are named using suffixes “-ate” or “-ite” • NO3 (nitrate) and NO2 (nitrite)

  4. most common polyatomic ions have a negative charge • One common polyatomic ion has a positive charge – ammonium ion, NH4

  5. Common Polyatomic Ions

  6. Bonding • Ionic Bonding with polyatomic ions is the same as other ions • Use the crossover method

  7. Example 1

  8. Example 2

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