Naming compounds

NOTECARDS

• Use the information in this powerpoint to create one notecard per page

• Staple the notecards• Ionic compounds • Molecular Compounds• Include definitions for each, examples and practice

problems

NamingBinary Ionic Compoundscomposed of a metal and a nonmetal• TYPE 1: non transition metals• Metal Cation is a positive ion and named first• Nonmetal anion is negative ion and named second with –

ide ending• Polyatomic ions may take the place of the cation or the

anion depending on their charge• Name the polyatomic ion as is.

PRACTICE

• MgO• KCl• CaBr2

• Al2(SO)3

• (NH4)2SO4

Naming Binary Ionic compoundsType II: transition metals

• Many metals con form more than 1 type of cation.• Identify the charge of the anion to help you determine the cation charge• The net charge equals zero• Use roman numerals to indicate the charge of the cation indicating the

charge in parenthesis, • Write the cation, the roman numeral to indicate the charge in

parenthesis, then write the anion ending in –ide• If the anion is a polyatomic ion, name it as is.

PRACTICE

• Cu CO3

• FeCl3

• HgSO4

• CuI• Cu2O

Binary Compounds that contain nonmetalsMOLECULAR

• Use prefixes to denote the number of atoms present• Mono, di, tri, tetra, penta, hexa, hepta, octa, nano, deca• The prefix –mono is never used for naming the first

element• Name the first element in the formula, then the second

element with –ide ending• Prefix + name, prefix + name, -ide ending

PRACTICE

• CO• CBr4

• P2O3

• SiS2

• S2F6

Writing Ionic Formulas

• Write the symbol for the metal first and then the symbol for the nonmetal

• Write the oxidation number (charges of these ions) taken from the periodic table

• Criss-cross• The total charge equals zero

Use the Criss- Cross Method

• sodium chlorate Na+ + ClO 3 - Na ClO 3

(does the charge add to 0?) (+1) + (-1) = 0

• calcium chloride Ca2+ + Cl 1- CaCl2

does the charge add to 0? (+2) + 2(-1) = 0

PRACTICE

• Sodium nitrate• Potassium chloride• Calcium phosphate• sodium hydroxide• Copper (II) dichromate• Chromium (IV) Bromate

Writing molecular formulas• Use prefixes in the name to determine subscripts

• For example Pentanitrogen heptaphosphide N5P7

PRACTICE• Dinitrogen heptafluoride• triphosphorous hexachloride• Tellurium trioxide• Dinitrogen tetraoxide• Diohosphorus pentaoxide