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Ionic Compounds

Ionic Compounds. Formed from positive and negative ions. Almost always have a metal and a nonmetal. Ionic Compounds. Exist mostly as crystalline solids. Conduct electricity when melted or dissolved in water. [http://liftoff.msfc.nasa.gov/academy/materials/topaz.gif].

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Ionic Compounds

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  1. Ionic Compounds • Formed from positive and negative ions. • Almost always have a metal and a nonmetal.

  2. Ionic Compounds • Exist mostly as crystalline solids. • Conduct electricity when melted or dissolved in water. [http://liftoff.msfc.nasa.gov/academy/materials/topaz.gif]

  3. Ionic Compound Names • Example: NaCl • Sodium Chloride • When naming the compounds always list the positive ion first (metal) and end then nonmetal in –ide.

  4. Ionic Compound Names • Example: MgBr2 • Magnesium Bromide • Example: Al2O3 • Aluminum Oxide

  5. Ionic Compound Formulas • Example: Aluminum Bromide • AlBr3 • When writing formulas, place the positive ion first (metal!) and balancing the charges to make a neutral compound. • Example: Magnesium Chloride

  6. Ionic Compound Formulas • Mg+2 and Cl-1 • Cl-1 • Final Formula: MgCl2 [http://www.southwest.com.au/~jfuller/chemistry/magnesiumchloride.gif]

  7. Ionic Compound Formulas • Example: Sodium Oxide • Na2O • Example: Calcium Sulfide • CaS

  8. Transition Metal Ions [http://wps.prenhall.com/wps/media/objects/602/616516/Media_Assets/Chapter02/Text_Images/FG02_12.JPG]

  9. Transition Metal Ions

  10. Transition Metal Ions • Example: Iron (III) Chloride • The roman numeral gives you the charge of the metal! • Fe +3 and Cl –1 • FeCl3 • Example: Copper (II) Oxide • CuO

  11. Transition Metal Ions • Example: CoBr2 • When writing the name, you must find the charge of the metal! • Bromine is normally Br-1, so Cobalt must be Co+2 • Cobalt (II) Bromide

  12. Polyatomic Ions • Ions that have more than one atom, and always are found as a group. [http://www.hibbing.tec.mn.us/programs/dept/chem/V.12/polyatomic_ion_ex.jpg]

  13. Polyatomic Ions • Example: Calcium Hydroxide • Ca+2 and OH-1 • Ca(OH)2 • Example: Magnesium Phosphate • Mg+2 and PO4-3 • Mg3(PO4)2

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