Warm-upWarm-up• Are the following compound ionic?Are the following compound ionic?

• MgClMgCl2 2

• COCO22

• CaSCaS

• HH22OO

• What are the characteristics of ionic compounds?What are the characteristics of ionic compounds?• Metal and nonmetal in formulaMetal and nonmetal in formula• High melting point.High melting point.• Conductive as liquid, or dissolved in water.Conductive as liquid, or dissolved in water.• Form CrystalsForm Crystals• Shatter when struckShatter when struck

4-6: Naming Compounds4-6: Naming Compounds• NameName ionic compounds. ionic compounds.

• WriteWrite formulas from ionic compound names. formulas from ionic compound names.

Naming Ionic CompoundsNaming Ionic Compounds

• Write the name of the metal.Write the name of the metal.• Write the name of the nonmetal with the ending Write the name of the nonmetal with the ending

changed to –ide.changed to –ide.

Example:Example:

Nitrogen = nitrideNitrogen = nitride Sulfur = sulfideSulfur = sulfide

Oxygen = oxideOxygen = oxide Chlorine = chlorideChlorine = chloride

Phosphorus = phosphidePhosphorus = phosphide Iodine = iodideIodine = iodide

Fluorine = fluorideFluorine = fluoride Bromine = bromideBromine = bromide

Try these examples on your own.Try these examples on your own.• BeFBeF

• beryllium fluorideberyllium fluoride

• LiLi22OO

• lithium oxidelithium oxide

• BB22SS33

• boron sulfideboron sulfide

• MgMg33NN22

• magnesium nitridemagnesium nitride

• CaClCaCl22

• calcium chloridecalcium chloride

Transition metalsTransition metals• Transition metals can have different numbers of Transition metals can have different numbers of

valence electrons. valence electrons.

• Transition metals can have multiple ion charges.Transition metals can have multiple ion charges.

• A roman numeral indicates the charge of the ionA roman numeral indicates the charge of the ion• FeFe+2+2 FeFe+3+3

• Iron (II)Iron (II) Iron (III)Iron (III)• CuCu+1+1 CuCu+2+2

• Copper (I)Copper (I) Copper (II)Copper (II)

• Nonmetal do not have multiple chargesNonmetal do not have multiple charges• No roman numerals!!!!!No roman numerals!!!!!

Naming Ionic CompoundsNaming Ionic Compounds• Name metal (positive charge)Name metal (positive charge)

• Use roman numeral only if it is a transition metal with Use roman numeral only if it is a transition metal with multiple charges.multiple charges.

• Name nonmetal (negative charge)Name nonmetal (negative charge)• No roman numerals!!!!!!!!No roman numerals!!!!!!!!

Naming ExamplesNaming Examples• CuClCuCl

• Copper (I) chlorideCopper (I) chloride

• MnMn22SS33

• Manganese (III) sulfideManganese (III) sulfide

• SnOSnO22

• Tin (IV) oxideTin (IV) oxide

• ZnClZnCl22

• Zinc chlorideZinc chloride

Formula ExamplesFormula Examples• Chromium (III) sulfideChromium (III) sulfide

• CrCr22SS33

• Gallium (III) nitrideGallium (III) nitride• GaNGaN

• Lead (II) fluorideLead (II) fluoride• PbFPbF22

• Copper (II) nitrideCopper (II) nitride• CuCu33NN22

• Iron (III) sulfideIron (III) sulfide• FeFe22SS33

Polyatomic IonsPolyatomic Ions• Ions that are made of more than one atom.Ions that are made of more than one atom.Ammonium – NHAmmonium – NH44

++

Nitrite – NONitrite – NO22--

Nitrate – NONitrate – NO33--

Hydroxide – OHHydroxide – OH--

Cyanide – CNCyanide – CN--

Permanganate – MnOPermanganate – MnO44--

Hypochlorite – ClOHypochlorite – ClO--

Chlorite – ClOChlorite – ClO22--

Chlorate – ClOChlorate – ClO33--

Perchlorate – ClOPerchlorate – ClO44--

Acetate – CAcetate – C22HH33OO22--

Carbonate – COCarbonate – CO33-2-2

Sulfite – SOSulfite – SO33-2-2

Sulfate – SOSulfate – SO44-2-2

Perioxide – OPerioxide – O22-2-2

Phosphate – POPhosphate – PO44-3-3

Arsenate – AsOArsenate – AsO44-3-3

Writing polyatomic formulasWriting polyatomic formulas• Sodium carbonateSodium carbonate

• NaNa22COCO33

• Calcium nitrateCalcium nitrate• Ca(NOCa(NO33))22

• Ammonium phosphateAmmonium phosphate• (NH(NH44))33POPO44

• Potassium permanganatePotassium permanganate• KMnOKMnO44

• Aluminum chloriteAluminum chlorite• Al(ClOAl(ClO22))33

Naming Polyatomic examplesNaming Polyatomic examples• NHNH44ClCl

• Ammonium chlorideAmmonium chloride

• NaNONaNO33

• Sodium nitrateSodium nitrate

• KCNKCN• Potassium cyanidePotassium cyanide

• LiLi33POPO44

• Lithium phosphateLithium phosphate

• (NH(NH44))22COCO33

• Ammonium carbonateAmmonium carbonate