II. Types of ions II. Types of ions ionic compounds formed from elements that change losing or gaining stablecompoundby losing or gaining electrons to become more stable compound. 2 types of ions: CATIONS ANIONS

Cations Ion with + charge, from loss of an electron Naming: Formed from metallic elements same but add the word “ion”. Al 3+ = Li + = Lithium ion Aluminum ion

Anions Ion with a - charge, from gaining electron Naming: Formed from nonmetallic elements ending change to“-ide” & add “ion”. P 3- = O 2- = oxide ion phosphide ion

Examples Change in electrons: 1 electron gained Formula of ion: Symbol: Br BrBr Bromide ion Name of ion: - Symbol: Mg Change in electrons: 2 electrons lost Formula of ion: Name of ion: Mg 2+2+ Magnesium ion

III. 2 Types of chemical formulas III. 2 Types of chemical formulas Molecular Formula Structural Formula H 2 O water No arrangement Shows arrangement

Diagrams/models - To show the arrangement of the atoms 3 dimensions - H H O What is the Structural Formula for water

Diatomic Molecules Br 2 I 2 N 2 Cl 2 H 2 O 2 F 2 What does the subscript 2 represent? Two atoms! Are these molecular or structural formulas? & NaCl ? Formula Unit

What is a Formula Unit or Empirical Formula subscripts reduced! Na 42 Cl 42 = NaCl Si 2 O 4 = SiO 2 Lowest whole # ratio of ions

Zinc Nitrate, Lithium Flouride, Potassium Nitrate, Magnesium Flouride (Binary?) Potassium Chloride AgF AlBr 3 KCl Aluminum Bromide Magnesium Chloride MgCl 2 Type I - simple CdF 2 ZnF 2 Silver Fluoride Zinc Fluoride Cadnium Fluoride

SiO 2 CO PCl 3 +4 Phosphorus Tri Chloride Carbon Monoxide KF AgNO 3 Ba(NO 3 ) 2 Potassium Flouride Barium Nitrate Silver Nitrate Diphosphorus trioxide Silicon Tetrabromide P2O3P2O3 SiBr 4 CuCO 3 3 FeBr 3 SnO (CO 3 ) 2- (Br - ) 3 O 2- Type III - Prefix

Nomenclature of Inorganic Compounds Cpd.name aqueous solution Cpd.name aqueous solution HF hydrogen fluoride hydrofluoric acid HF hydrogen fluoride hydrofluoric acid HCl hydrogen chloride hydrochloric acid HCl hydrogen chloride hydrochloric acid HBr hydrogen bromide hydrobromic acid HBr hydrogen bromide hydrobromic acid H 2 S You do it! H 2 S You do it!

Naming of Inorganic Compounds Cpd.nameaqueous solution Cpd.nameaqueous solution HF hydrogen fluoride hydrofluoric acid HF hydrogen fluoride hydrofluoric acid HCl hydrogen chloride hydrochloric acid HCl hydrogen chloride hydrochloric acid HBr hydrogen bromide hydrobromic acid HBr hydrogen bromide hydrobromic acid H 2 S hydrogen sulfide hydrosulfuric acid H 2 S hydrogen sulfide hydrosulfuric acid

Nomenclature of Inorganic Compounds two nonmetals other than H two nonmetals other than H minimum number of prefixes minimum number of prefixes COcarbon monoxide COcarbon monoxide CO 2 carbon dioxide CO 2 carbon dioxide SO 3 sulfur trioxide SO 3 sulfur trioxide OF 2 You do it! OF 2 You do it!

Naming of Inorganic Compounds two nonmetals other than H two nonmetals other than H minimum number of prefixes minimum number of prefixes COcarbon monoxide COcarbon monoxide CO 2 carbon dioxide CO 2 carbon dioxide SO 3 sulfur trioxide SO 3 sulfur trioxide OF 2 oxygen difluoride OF 2 oxygen difluoride P 4 O 6 You do it! P 4 O 6 You do it!

Nomenclature of Inorganic Compounds two nonmetals other than H two nonmetals other than H minimum number of prefixes minimum number of prefixes COcarbon monoxide COcarbon monoxide CO 2 carbon dioxide CO 2 carbon dioxide SO 3 sulfur trioxide SO 3 sulfur trioxide OF 2 oxygen difluoride OF 2 oxygen difluoride P 4 O 6 tetraphosphorus hexoxide P 4 O 6 tetraphosphorus hexoxide P 4 O 10 You do it! P 4 O 10 You do it!

Nomenclature of Inorganic Compounds two nonmetals other than H two nonmetals other than H minimum number of prefixes minimum number of prefixes COcarbon monoxide COcarbon monoxide CO 2 carbon dioxide CO 2 carbon dioxide SO 3 sulfur trioxide SO 3 sulfur trioxide OF 2 oxygen difluoride OF 2 oxygen difluoride P 4 O 6 tetraphosphorus hexoxide P 4 O 6 tetraphosphorus hexoxide P 4 O 10 tetraphosphorus decoxide P 4 O 10 tetraphosphorus decoxide