Naming Ionic Compounds

What is a compound?  A compound is a pure substance consisting of two or more different elements  There are two types of compounds:  Covalent  Ionic

Name the following ionic compounds:  NaCl __________________  CaI 2 __________________  Li 2 SO 4 ___________________________  FeO __________________  Cu(NO 3 ) 2 ___________________________ Having trouble??? Use this flowchart to help you discover how to name these compounds!flowchart

Ionic Compounds Name the cation Forms one (+) ion Use element name Forms more than one (+) ion Use element name and Roman numeral Name the anion Single ion Use element name and add –ide ending Polyatomic ion Use name of polyatomic ion Ready to practice?

Ionic Compounds  Ionic compounds are composed of a metal and a non-metal  Metals are located to the left of the stair-step Metals Go back to flowchart Ready to practice? Non-metals

Cations  A cation is a positively (+) charged ion  Metals are cations  To form a cation, a metal atom lose one or more electrons Go back to flowchartReady to practice? Li 3 p + e- Neutral Li atom has 3 p + and 3 e- (+3) + (-3) = 0 (no charge) Li 3 p + e- A lithium ion has 3 p + and 2 e- (+3) + (-2) = +1

Anions  An anion is a negatively (−) charged ion  Non-metals are anions  To form an anion, a non-metal gains one or more electrons Go back to flowchartReady to practice? O 8 p + e- Neutral O atom has 8 p + and 8 e- (+8) + (-8) = 0 (no charge) An oxygen ion has 8 p + and 6 e- (+8) + (-6) = -2 e- O 8 p + e-

Fixed-Charge Ions  Most metals form cations with a single charge  For example: Li +, Mg 2+, Cl -, O 2-  You can find these charges using group numbers Go back to flowchart Ready to practice?

Variable Charges  Some transition metals can form cations with more than one charge ElementCharges Copper (Cu)2+, 3+ Lead (Pb)2+, 4+ Chromium (Cr)2+, 3+ Iron (Fe)2+, 3+ Tin (Sn)2+, 4+ Go back to flowchart Ready to practice?

Naming Cations with a Fixed Charge  When naming a cation with a fixed charge, simply say the element’s name  The element name can be found on the periodic table Go back to flowchart Ready to practice?

Naming Cations with a Variable Charge  To name a cation with a variable charges, use a Roman numeral to indicate the charge  Examples: Go back to flowchart Ready to practice? IonName Cu 2+ Copper (II) Pb 4+ Lead (IV) Fe 3+ Iron (III)

Monatomic Ions  A monatomic ion is an ion that is made of only one atom  Examples: Na +, Ca 2+, Cl -, S 2- Go back to flowchart Ready to practice?

Polyatomic Ions  A polyatomic ion is an ion made up of more than one type of atom  Examples: SO 4 2-, NO 2 -, PO 4 3- Go back to flowchart Ready to practice?

Naming Single Anions  To name a single anion use the root of the element name and add the ending –ide Go back to flowchart Ready to practice? Chlor ine + -ide  Chloride root

Naming Polyatomic Anions  To name polyatomic anions, use the name of the polyatomic ion Go back to flowchart Ready to practice?  These ions usually end in -ate or -ite

Name the following ionic compounds:  NaCl __________________  CaI 2 __________________  Li 2 SO 4 ___________________________  FeO __________________  Cu(NO 3 ) 2 ___________________________ Go back to flowchartCheck your answers!

Check Your Answers!  NaClsodium chloride  CaI 2 calcium iodide  Li 2 SO 4 lithium sulfate  FeOiron (II) oxide  Cu(NO 3 ) 2 copper (II) nitrate