Naming monoatomic and polyatomic ions

There are two types of ions: Cation Anion + ve charge- ve charge all metalsall non metals Transition metals name ends with -ide have multiple charges Exampes: Ca 2+ Cl – Formation of ions

Nomenclature How to name an ion? Cations Name the cations as full element name example Ca 2+ is calcium ion Anions Add suffix ide for anions example Cl – is Chloride (Chlorine => Chloride)

Most transition metals can form cations of more than one possible charge. There are two common methods of naming such ions Stock methodClassical method Use Roman numerals in Higher ion ends with suffix-ic parenthesis to indicate Lower ion ends with suffix-ous Charge.Remember H-ic upExample Fe 2+ is Fe(II) /Iron(II) ionFe 2+ : ferrous ion Fe 3+ is Fe(III)/Iron (III) ionFe 3+ : ferric ion Naming of Cations with multiple charges

Practice problems ElementSymbolName of ionSymbol of ion 1. sodium 2. bromine 3. magnesium 4. chlorine 5. oxygen 6. boron 7. Lithium 9. Phosphorus 10.Aluminum

Practice: Name the cations with multiple charges write the name and symbol for the ions of the given elements acoording to Stock method and Classical method Iron Copper Tin Mercury Lead Antimony Element Symbol of ionsName of ionName of ion

A monatomic ion contains only one atom Example: A polyatomic ion contains more than one atom acting as a team. Example: Na +, Cl -, Ca 2+, O 2-, Al 3+, N 3- (OH) -, (CN) -, (NH 4 ) +, (NO 3 ) - Name: Hydroxide, Cyanide, Ammonium, Nitrate

Common monoatomic Cations and Anions

Common polyatomic Cations and Anions

Oxoanions perchlorateClO 4 - chlorateClO 3 - chloriteClO 2 - hypochloriteClO - nitrateNO 3 - nitriteNO 2 - phosphatePO 4 3- phosphitePO 3 3- sulfate SO 4 2- sulfiteSO 3 2- areare polyatomic anions that contain one or more oxygen atoms with another element. They have names ending in –ate or –ite

areare compounds that contain polyatomic ions and hydrogen. Oxoacid HNO 3 nitric acid H 2 CO 3 carbonic acid H 2 SO 4 sulfuric acid Example: ( H + and NO 3 - ) ( H + and CO 3 - ) ( H + and SO 4 - )