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

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