A) Nomenclature (naming) compounds 1. Covalent 2. Ionic B) Writing proper formulas

Covalent or Ionic Ionic: ___________ + _____________ Covalent: __________ + ___________ NaCl I or CSO2I or C P2Cl4 I or CAgClI or C FeCl3 I or CMnOI or C CaOI or CNS2I or C

Naming molecular compounds Covalent BondsNon-metal + non-metal Prefixes are used to determine the number of each element (Except when the first element has only ONE (1) Number Prefix 1 _______- 6 ______- 2 _______- 7 ______- 3 _______- 8 ______- 4 _______- 9 ______- 5 _______- 10 ______- First element = # prefix + element name Second element = # prefix + element prefix + “ide”

COVALENT COMPOUNDS A) H2O____________________ B) CO2____________________ C) CCl4____________________ D) P2S4____________________

2 nd Element names (non-metals) N = NITRogen P = PHOSPHorus S = SULFur Cl = CHLORine Br = BROMine NITRide PHOSPHide SULFide CHLORide BROMide

WRITING FORMULAS from names Determine each element & number Tetrasulfur pentaoxide Octanitrogen difluoride

COVALENT COMPOUNDS

Naming BINARY (2 elements) IONIC (one charge ONLY) Some Ionic compounds have more than 2 elements. NaSO4Ca3(PO4)2 (NH3)2SO4MnSO4 Some metals have more than one charge Fe (+2, +3) Sn (+2, +4)

Identification of compounds: List as either Covalent or Ionic. If Ionic, list as either Binary or Ternary (more than 2 elements) 1. CO2 I or C if Ionic: Binary or Ternary 2. CaCl2 I or C if Ionic: Binary or Ternary 3. S2O5 I or C if Ionic: Binary or Ternary 4. Na2SO4 I or C if Ionic: Binary or Ternary 5. CoCl3I or C if Ionic: Binary or Ternary 6. Fe2O3 I or C if Ionic: Binary or Ternary 7. N2Cl4 I or C if Ionic: Binary or Ternary 8. Mn3(PO4)4 I or C if Ionic: Binary or Ternary

Binary Ionic (one charge) Name the metal Name the non-metal prefix + “ide” CaCl2= Calcium chloride Li2O= Lithium oxide

Writing formulas of Binary Ionic Determine the metal and its charges Determine the non-metal and its charges Criss-cross if necessary 1. Lithium chloride4. Potassium phosphide 2. Calcium oxide5. Boron fluoride 3. Aluminum sulfide6. Barium phosphide

Determine the name from the formula 1.Na2O5. AlP 2. Al2S36.Be3N2 3.Ba3P27.CsBr 4.KI8.Mg3N2

FORMULAIonic or CovalentName 1. CO2I or C_________________ 2. Na2SI or C_________________ 3. Al2S3I or C_________________ 4. S2O5I or C_________________

“Up to this Point” Covalent: _________________ + __________________ Ionic: _________________ + __________________ Binary: Ternary: Metal with only one charge:

NEXT: Metals with more than one charge LIST THE TWO POSSIBLE CHARGES AND THEIR APPROPRIATE NAME WITH ROMAN NUMERAL SymbolName Iron: Cobalt Copper:

Naming: Binary Ionic more than one charge You must determine the charge of the metal. (“REVERSE” Crisscross) Co2S3_________________________ CoCl2_________________________ FeO_________________________ FeP_________________________

Formula for Binary Ionic more than one charge. a. chromium (III) chloride_______________________ b. tin (IV) oxide_______________________ c. lead (II) oxide_______________________ d. copper (II) iodide_______________________ e. cobalt (II) oxide_______________________ f. cobalt (III) oxide_______________________

Naming Binary Ionic (more than one charge) a. SnBr2_______________________ b. SnBr4_______________________ c. CrO_______________________ d. Cr2O3_______________________ e. Fe2O3_______________________ f. HgI2_______________________

Write the formula a. chromium (III) sulfide________________ b. manganese (IV) oxide________________ c. gold (III) chloride________________ d. titanium (IV) chloride________________ e. iron (II) bromide________________ f. iron (II) oxide________________

Write the proper name a. PbCl2_________________________________ b. Fe2O3_________________________________ c. SnI2_________________________________ d. Hg2O_________________________________ e. HgS_________________________________ f. CuI_________________________________

TERNARY COMPOUNDS: Consist of a metal and a POLYATOMIC ion. Poly = manyatomic = atom ion = charge particle A group of atoms that act as one large atom. Contains a specific charge.

List of Polyatomic Ions

Determining charges

Identifying the polyatomic When determining the formula: ends in “ate” or “ite”, except HYDROXIDE and CYANIDE Or if it begins with AMMONIUM Circle the polyatomic ion: Calcium sulfate Aluminum phosphate Tin (II) tartrate Ammonium oxide Sometimes you can have two polyatomic ions Ammonium sulfate

Identifying the polyatomic ion from a formula The polyatomic ion is always in a TERNARY compound. It’s always after the METAL, unless the compound begins with NH4 (ammonium) Draw a line between the (+) side and the (-) side Circle the polyatomic ion Li2SiO3Al2(SO4)3 LiClO3NH4Br

Naming the Polyatomic Ion

Naming Ternary Identify the ternary compound. Determine whether or not the METAL requires a ROMAN NUMERAL (contains more than one charge===GREEN) Name the Ternary compounds CaSO4 : ___________________________ Mn3(PO4)4 : ______________________________ NH4Cl :____________________________

Determining formulas for Ternary compounds. Determine the charge of the CATION (+) ion either the METAL or NH4 Determine the charge of the POLYATOMIC ion. CRISSCROSS if necessary Calcium sulfate:________ Barium hydroxide:________ Iron (III) carbonate:_______Ammonium sulfide:________