Nomenclature

Forms of Chemical BondsThere are 3 forms of bonding atoms:Ioniccomplete transfer of 1 or more electrons from one atom to another (one loses, the other gains)Covalentsome electrons shared between atomsMetallic holds atoms of a metal together

Most bonds are somewhere in between ionic and covalent.1Electron Dot Notation

Naming Molecular Compounds

CH4 methane

BCl3 boron trichlorideCO2 Carbon dioxideAll are formed from two or more nonmetals. Ionic compounds generally involve a metal and nonmetal (NaCl)

3Molecular (Covalent) Nomenclaturefor two nonmetalsPrefix System (binary compounds)1.Less electronegative atom comes first. 2.Add prefixes to indicate # of atoms. Omit mono- prefix on the FIRST element. Mono- is OPTIONAL on the SECOND element (in this class, its NOT optional!).3.Change the ending of the second element to -ide.

Molecular Nomenclature PrefixesPREFIXmono-di-tri-tetra-penta-hexa-hepta-octa-nona-deca-NUMBER12345678910CCl4

N2O

SF6

carbon tetrachloride dinitrogen monoxidesulfur hexafluorideMolecular Nomenclature: Examplesarsenic trichloride

dinitrogen pentoxide

tetraphosphorus decoxide

AsCl3 N2O5P4O10More Molecular ExamplesLearning Check Fill in the blanks to complete the following names of covalent compounds.CO carbon ______oxideCO2carbon _______________PCl3phosphorus _______chlorideCCl4carbon ________chlorideN2O_____nitrogen _____oxide

Learning Check 1.P2O5a) phosphorus oxideb) phosphorus pentoxidec) diphosphorus pentoxide

2.Cl2O7a) dichlorine heptoxideb) dichlorine oxidec) chlorine heptoxide 3. Cl2a) chlorineb) dichlorinec) dichloride

A flow chart for naming binary compounds.

Mixed Review Name the following compounds:1. CaOa) calcium oxideb) calcium(I) oxidec) calcium (II) oxide

2. SnCl4 a) tin tetrachlorideb) tin(II) chloride c) tin(IV) chloride

3. N2O3a) nitrogen oxide b) dinitrogen trioxidec) nitrogen trioxide

Solution Name the following compounds:

1. CaO

2. SnCl4

3.N2O3a) calcium oxidec) tin(IV) chlorideb) Dinitrogen trioxide