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Ionic Compounds

Ionic Compounds. composed of cations + anions electrically neutral the total positive charge equals the total negative charge formula units usua lly solid at room temperature have high melting points. Simple Ionic Compounds. Metal ion + Nonmetal ion  salt Examples

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Ionic Compounds

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  1. Ionic Compounds • composed of cations + anions • electrically neutral • the total positive charge equals the total negative charge • formula units • usua lly solid at room temperature • have high melting points

  2. Simple Ionic Compounds Metal ion + Nonmetal ion salt Examples Be+2 + N -3 Be3N2 Fe+3+ Cl -1  FeCl3 Subscript shows number of atoms present in formula unit

  3. Polyatomic Ions Collections of tightly bound atoms that behave as a unit and carry a charge examples SO3-2sulfite ion SO4-2 sulfate ion NO2 -2nitrite ion NO3-1 nitrate ion ClO2-1 chlorite ion ClO3-1 chlorate ion

  4. Ionic Compounds with Polyatomic Ions • Metal ion + Polyatomic ion or • Polyatomic ion + nonmetal ion • examples • Na+1 + SO4-2Na2SO4 • Mg+2 + NO3-1  Mg(NO3)2 • NH4+1 + N -3  (NH4)3 N Oh no parentheses!

  5. Given a formula, what’s the compound’s name? e.g. Be2C NH4MnO4 Al2(C2O4)3 H2SO4

  6. Given a compound’s name, what is its formula? e.g. ammonium sulfite phosphoric acid calcium chloride iron (III) nitrite

  7. Practice, practice, practice name  formula formula  name

  8. Simple Molecular Compounds • Composed of two non-metallic compounds • Uses prefixes to indicate the number of atoms in the molecule • mono, 1 • di, 2 • tri, 3 • tetra, 4 • penta, 5 • hexa, 6 • hepta, 7 • octa, 8 • nona, 9 • deca 10

  9. Simple Molecular Compounds examples: formula name CO carbon monoxide CO2 carbon dioxide N2O dinitrogen monoxide Cl2O3 dichloro trioxide SF6 sulfur hexafluoride

  10. More Simple Molecular Compounds examples: name formula nitrogen trifluoride NF3 phosphorus trichloride PCl3 carbon tetrachloride CCl4

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