NomenclatureNomenclatureCovalent Naming Covalent Naming

and and

Formula WritingFormula Writing

Molecular NomenclatureMolecular Nomenclature

Prefix System Prefix System (binary compounds)(binary compounds)

1.1. Less eLess e--negneg atom atom comes first. comes first.

2.2. Add Add prefixesprefixes to indicate # of atoms. to indicate # of atoms. Omit Omit mono-mono- prefix on first element. prefix on first element.

3.3. Change the ending of the Change the ending of the second element to second element to -ide-ide..

PREFIXPREFIXmono-mono-di-di-tri-tri-tetra-tetra-penta-penta-hexa-hexa-hepta-hepta-octa-octa-nona-nona-deca-deca-

NUMBERNUMBER1122334455667788991010

Molecular NomenclatureMolecular Nomenclature

CClCCl44

NN22OO

SFSF66

– carbon tetrachloride carbon tetrachloride

– dinitrogen monoxidedinitrogen monoxide

– sulfur hexafluoridesulfur hexafluoride

Molecular NomenclatureMolecular Nomenclature

arsenic trichloridearsenic trichloride

dinitrogen pentoxidedinitrogen pentoxide

tetraphosphorus decoxidetetraphosphorus decoxide

– AsClAsCl33

– NN22OO55

– PP44OO1010

Molecular NomenclatureMolecular Nomenclature

N O F

Cl

Br

I

H

Molecular NomenclatureMolecular Nomenclature

The Seven Diatomic ElementsThe Seven Diatomic Elements

BrBr22 I I22 N N22 Cl Cl22 H H22 O O22 F F22