Writing Formulas and Name for Ionic Compounds

CationsA cation is a positively (+) charged ionMetals are cationsTo form a cation, a metal atom lose one or more electronsGo back to flowchartReady to practice?Li3 p+e-e-e-Neutral Li atom has 3 p+ and 3 e- (+3) + (-3) = 0 (no charge)Li3 p+e-e-A lithium ion has 3 p+ and 2 e-(+3) + (-2) = +1AnionsAn anion is a negatively () charged ionNon-metals are anionsTo form an anion, a non-metal gains one or more electronsGo back to flowchartReady to practice?O8 p+e-e-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) = -2e-e-e-e-e-O8 p+e-e-e-e-e-e-Fixed-Charge IonsMost metals form cations with a single chargeFor example: Li+, Mg2+, Cl-, O2-You can find these charges using group numbersGo back to flowchartReady to practice?

Naming Cations with a Fixed ChargeWhen naming a cation with a fixed charge, simply say the elements nameThe element name can be found on the periodic tableGo back to flowchartReady to practice?Naming Cations with a Variable ChargeTo name a cation with a variable charges, use a Roman numeral to indicate the chargeExamples:Go back to flowchartReady to practice?IonNameCu2+Copper (II)Pb4+Lead (IV)Fe3+Iron (III)Monatomic IonsA monatomic ion is an ion that is made of only one atom

Examples: Na+, Ca2+, Cl-, S2-Go back to flowchartReady to practice?Polyatomic IonsA polyatomic ion is an ion made up of more than one type of atom

Examples: SO42-, NO2-, PO43-Go back to flowchartReady to practice?Naming Single AnionsTo name a single anion use the root of the element name and add the ending ide Go back to flowchartReady to practice?Chlorine + -ide ChloriderootNaming Polyatomic AnionsTo name polyatomic anions, use the name of the polyatomic ionGo back to flowchartReady to practice?

These ions usually end in -ate or -ite