Binary Ionic Compounds- consist of cations (usually metals) and anions (usually nonmetals), e.g., MgCl2Cation named first using name of elementMg = magnesiumAnion named by adding the –ide suffix to the name of the elementCl = chlorine  chlorideFormulas for ionic compounds must always be neutral: Mg2+ + (Cl-) x 2Practice:AtomsIons formedCompoundNameRb & IRb +1 I -RbIRubidium IodineF & KF - K +KFPotassium FluorideSe & CsSe 2- Cs 1+Cs2 SeCesium SelenideAl & SAl 3+ S 2-Al2S3Aluminum SulfideFor metals that form cations with different charges, a Roman numeral is added to indicate the charge of the cationPractice: Ionic CompoundsAtomsIons FormedCompoundNameFeOFe2+ O2-Iron(II) oxideFe2O3Fe3+ O2--6/2 = 3Iron(III) oxideCu3NCu+ N3-Copper(I) nitrideCu3N2Cu2+ N3-Copper(II) nitridePractice writing the chemical formula of ionic compounds:Sodium chloride: NaClChromium (III) fluorideSodium chlorideZinc NitrideCopper(I) oxideCommon Polyatomic IonsPolyatomic IonsCharged group of two or more atoms joined together by covalent bondsOxoanionsPolyatomic anions containing oxygen in combination with one or more other elementsExamples: acetate (C2H3O2 -), nitrate (NO3 -), carbonate (CO3 2-), perchlorate (ClO 4 -), sulfate (SO4 2-) (See Table 4.3)Practice: Polyatomic IonsWrite the names of the following compoundsCr(ClO4) 3NH4NO3 : AmmoniumWrite the chemical formulas for the following compounds:Lithium bicarbonate : LiHCO3Calcium hypobromite : Ca(BrO) 2Naming Molecular CompoundsBinary Molecular Compounds (e.g., SO3)Compounds consisting of two nonmetalsFirst element in the formula is named first.S=SulfurSecond element name is changed by adding suffix –ideO=oxygen  oxideAdd prefixes to identify quantity of atoms (see table 4.4)Sulfur TrioxideRules for using PrefixesDo not use the prefix mono- when naming first elementPrefixes ending with o or a are modified when used with elements beginning with vowelsPracticeWhat is the name of the following compounds?1 carbon +2 oxygen atoms= carbon dioxide1 oxygen +1 carbon atoms= carbon monoxide4 oxygen +2 nitrogen atoms= dinitrogen tetraoxideCHEM 111 1nd Edition Lecture 14 Outline of Last Lecture I. Types of Chemical BondsII. Coulomb’s LawIII. Properties of Covalent CompoundsIV. Covalent Bonding and Nomenclature Outline of Current Lecture II. Binary Ionic CompoundsIII. Common Polyatomic IonsIV. Naming Molecular CompoundsV. Rules for Using PrefixesCurrent LectureThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Binary Ionic Compounds- consist of cations (usually metals) and anions (usually nonmetals), e.g., MgCl2-Cation named first using name of elemento Mg = magnesium-Anion named by adding the –ide suffix to the name of the elemento Cl = chlorine  chloride-Formulas for ionic compounds must always be neutral: Mg2+ + (Cl-) x 2Practice:Atoms Ions formed Compound NameRb & I Rb +1 I - RbI Rubidium IodineF & K F - K + KF Potassium FluorideSe & Cs Se 2- Cs 1+ Cs2 Se Cesium SelenideAl & S Al 3+ S 2- Al2S3Aluminum Sulfide-For metals that form cations with different charges, a Roman numeral is added to indicate the charge of the cationPractice: Ionic CompoundsAtoms Ions Formed Compound NameFeO Fe2+ O2- Iron(II) oxideFe2O3Fe3+ O2- -6/2 = 3 Iron(III) oxideCu3N Cu+ N3- Copper(I) nitrideCu3N2Cu2+ N3- Copper(II) nitridePractice writing the chemical formula of ionic compounds:Sodium chloride: NaClChromium (III) fluoride Sodium chlorideZinc NitrideCopper(I) oxideCommon Polyatomic Ions-Polyatomic Ionso Charged group of two or more atoms joined together by covalent bonds-Oxoanionso Polyatomic anions containing oxygen in combination with one or more other elementso Examples: acetate (C2H3O2 -), nitrate (NO3 -), carbonate (CO3 2-),perchlorate (ClO 4 -), sulfate (SO4 2-) (See Table 4.3)Practice: Polyatomic IonsWrite the names of the following compounds-Cr(ClO4) 3 -NH4NO3 : AmmoniumWrite the chemical formulas for the following compounds:-Lithium bicarbonate : LiHCO3-Calcium hypobromite : Ca(BrO) 2Naming Molecular Compounds-Binary Molecular Compounds (e.g., SO3)o Compounds consisting of two nonmetalsFirst element in the formula is named first.S=SulfurSecond element name is changed by adding suffix –ideO=oxygen  oxideAdd prefixes to identify quantity of atoms (see table 4.4)Sulfur TrioxideRules for using Prefixes-Do not use the prefix mono- when naming first element-Prefixes ending with o or a are modified when used with elements beginning with vowelsPracticeWhat is the name of the following compounds?1 carbon +2 oxygen atoms= carbon dioxide 1 oxygen +1 carbon atoms= carbon monoxide 4 oxygen +2 nitrogen atoms= dinitrogen