Naming Inorganic Compounds Chapter 2
Naming Inorganic Compounds lonic compounds Chemical Nomenclature Acids Molecular compounds Rules for Naming Monatomic Ions Positive ions---Cations 1.Cations formed from metal atoms name as the metal. Na*Sodium ion Mg:Magnesium ion Zn2+:Zinc ion K+:Potassium ion Ca2:Calcium ion Ba2 Barium ion Li:lithium ion Al3+:Aluminum ion
Rules for Naming Monatomic Ions Positive ions---Cations 1. Cations formed from metal atoms name as the metal. Ionic compounds Chemical Nomenclature Acids Molecular compounds + + Na : : Li : lithium ion Sodium ion K Potassium ion 2 2 2 2+ : : : Ba : Mg Magnesium ion Zn Zinc ion Ca Calcium ion Barium ion 3+ Al : Aluminum ion
Rules for Naming Monatomic Ions Positive ions--Cations 2.If a metal can form different cations,the positive charge is indicated by a Roman numeral in parentheses following the name of the metal Fe:iron(II)ion Cu:Copper(1)ion Fe iron(III)ion Cu2+Copper(II)ion An older method: -ous the lower charged Fe2*:ferrous ion Cu'cuprous ion -ic the higher Fe:ferric ion Cu:cupric ion charged
2. If a metal can form dif erent cations, the positive charge is indicated by a Roman numeral in parentheses following the name of the metal 2 3 : ( ) : ( ) Fe iron II ion Fe iron III ion + 2 : C ( ) : ( ) Cu opper I ion Cu Copper II ion -ous : the lower charged -ic : the higher charged An older method : 2 3 : Fe : ferr ion Fe fer ous ric ion 2 : : Cu cupr ion Cu cup ous ric ion
Fe:iron(II ion Fe iron(III)ion cover oil° spray microscope several thousand volts uniform electric field Simplified scheme of Millikan's oil drop experiment
Simplified scheme of Millikan’s oil drop experiment 2 3 : ( ) : ( ) Fe iron II ion Fe iron III ion
Rules for Naming Monatomic Ions Positive ions--Cations 2.If a metal can form different cations,the positive charge is indicated by a Roman numeral in parentheses following the name of the metal Common cations of the transition elements: Cr3+:chromium(IID)or chromic Cr2+:chromium(ID)or chromous Hg2+:mecury(II)or mercuric Ag":silver Hg2:mecury(I)or mercurous Zn2+:zinc Co2+:cobalt(II)or cobaltous Cd2+:cadmium Mn2*:manganese(II)or manganous
2. If a metal can form dif erent cations, the positive charge is indicated by a Roman numeral in parentheses following the name of the metal Common cations of the transition elements: 3+ 2+ 2+ 2+ 2 2+ 2+ Cr :chromium(III) or chrom Cr :chromium(II) or chrom Hg :mecury(II) or mercur Hg :mecury(I) or mercur Co :cobalt(II) or cobalt Mn :manganese ic ous ic ous ous (II) or manganous + 2+ 2+ Ag :silver Zn :zinc Cd :cadmium