CHEMICAL NAMES & FORMULAS. Monatomic Ions Monatomic ion – ions formed from a single atom. Naming Monatomic cations are identified by the element's name.

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Presentation transcript:

CHEMICAL NAMES & FORMULAS

Monatomic Ions Monatomic ion – ions formed from a single atom. Naming Monatomic cations are identified by the element's name. Monatomic anions are named by dropping the ending of the element's name and adding –ide to the root name. FluorineFluoride SulfurSulfide

Binary Compounds Binary Compounds- compounds composed of two different elements. Binary ionic compounds – metal and a nonmetal. Binary molecular compounds – 2 nonmetals

Steps for determining subscripts in formulas for ionic compounds. 1. Write the symbols for the ions side by side. Cations first. 2. Post the charges. 3. Cross and drop the charges. 4. Check the subscripts and simplify.

Example Aluminum and oxygen

Stock System of Nomenclature The purpose is to distinguish between cations of elements with different charges. Fe 2+ Fe 3+ iron (II) iron (III) The roman numeral is enclosed in parentheses and is placed immediately after the metal name.

Polyatomic Ions Oxyanions – polyatomic ions containing oxygen.

CW/HW Element CationAnionCross- drop Chemical Formula Chemical Name potassiumchlorine seleniumlithium bromineLead (IV) silveriodine carbonmagnesium Chemical NameCationAnionChemical Formula Cobalt (III) chloride Aluminum sulfide CaS PbO

Ion NameElementCationAnionCross- drop Chemical Formula Chemical Name hydroxidesodium phosphatelithium carbonateLead (IV) NH 4 Cl Be(ClO 4 ) 2 Ba(NO 2 ) 2