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Ionic CompoundsIonic Compounds Formed from
positive and negative ions.
Almost always have a metal and a nonmetal.
Ionic CompoundsIonic Compounds Exist mostly as
crystalline solids. Conduct
electricity when melted or dissolved in water.
[http://liftoff.msfc.nasa.gov/academy/materials/topaz.gif]
Ionic Compound NamesIonic Compound Names
Example: NaCl Sodium Chloride When naming the compounds
always list the positive ion first (metal) and end then nonmetal in –ide.
Ionic Compound NamesIonic Compound Names
Example: MgBr2
Magnesium Bromide Example: Al2O3
Aluminum Oxide
Ionic Compound FormulasIonic 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
Ionic Compound FormulasIonic Compound Formulas
Mg+2 and Cl-1
Cl-1
Final Formula: MgCl2
[http://www.southwest.com.au/~jfuller/chemistry/magnesiumchloride.gif]
Ionic Compound FormulasIonic Compound Formulas
Example: Sodium Oxide Na2O Example: Calcium Sulfide CaS
Transition Metal IonsTransition Metal Ions
[http://wps.prenhall.com/wps/media/objects/602/616516/Media_Assets/Chapter02/Text_Images/FG02_12.JPG]
Transition Metal IonsTransition Metal Ions
Transition Metal IonsTransition 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
Transition Metal IonsTransition 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
Polyatomic IonsPolyatomic 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]
Polyatomic IonsPolyatomic Ions
Example: Calcium Hydroxide Ca+2 and OH-1
Ca(OH)2
Example: Magnesium Phosphate Mg+2 and PO4
-3
Mg3(PO4)2