The anatomy of the periodic table

Get out your periodic tablesKnow where the following are on your

periodic table (p.t)Group AGroup BMetalsNonmetalsMetalloids (Semimetals)

Note - aluminum is not considered a metalloid

The anatomy of the periodic table

Know where the following are on your periodic table (p.t) continued

Transition metalsInner transition metalsAlkali metalsAlkaline metalsHalogensNoble gases

QuickTime™ and aYUV420 codec decompressor

are needed to see this picture.

QuickTime™ and aYUV420 codec decompressor

are needed to see this picture.

Ionic Moleculari.e. covalent

Naming Compounds

Naming Molecular Compounds

Molecules are made up of nonmetalsPrefixes are used to represent numbers

of atoms. See your text for prefixesBinary compounds end in -ideExamplesName? - Cl2O8 and OF2 Formula for? - dinitrogen tetroxideAnswers - dichlorine octoxide, oxygen

difluoride, N2O4

Naming Molecular Compounds

Your turn. Try these.Name or write the formula for:

Boron trichlorideDinitrogen tetrahydrideN2O5 PF5 S4N2 CCl4 SO3 H2O

AnswersBCl3 N2H4 dinitrogen pentoxidePhosphorus pentafluoride Tetrasulfur dinitrideCarbon tetrachloride Sulfur TrioxideDihydrogen Monoxide

Take ten minutes and work a few problems on the “Naming covalent

compounds” side of your worksheet.

Ions

An atom that carries a chargeThe charge on the ion is called the

Oxidation state or Oxidation Number

Cation - positively charged atomMetals form cationsCATions are PAWsitive

Anion - negatively charged atomNonmetals form anions

Naming Cations

Name the metal followed by the word ion

ExampleNa - sodium - neutral elementNa1+- sodium ion - cation of the element

Another example:Mg - magnesium Mg2+ - Magnesium

ion

Naming Anions

Ending changes are used for Anions

Elemental anions will end in -ideExample

Cl2 - chlorine - neutral elementCl1- - chloride - anion of the element

Another exampleO2 - oxygen O2- Oxide

Writing Formulas for Binary Ionic Compounds

The periodic table tells you the charge for group A (aka - the representative elements)

Group 1A - 1+ Group 2A - 2+Group 3A - 3+ Group 4 - dependsGroup 5A - 3- Group 6A - 2-Group 7A - 1- Group 8A or (0) -

does not form ions

Naming

Your turn:Name or write the symbol for the

following:Aluminum PhosphideCalcium Ion IodineGa3+ NitrogenK Sulfide

Naming Binary Ionic Compounds

Name the metal then the nonmetal with the ending changing to -ideThe -ide tells the person it is a binary

compound and the anion portion.

Examples: MgCl2 K2SMagnesium Chloride Potassium

Sulfide

Writing Formulas for Binary Ionic Compounds

All compounds are electrically neutralTo write the formula, figure out how

many cations and anions are needed so that the number of positives and negatives are equal. Find the least common multiple to figure out the total number of +’s and -’s. Then divide by the charge to find out how many of each atom is needed!

If X1+ and Y2-, what would be the formula?X2Y - Charges total 2 +’s and 2 -’s

Writing Formulas for Binary Ionic Compounds

If X3+ and Y2-, what would be the formula?

X2Y3 - Charges total 6 +’s and 6 -’sFind the formula for the following

pairs of ions:Na1+ , P3- Sr2+ , N3-

Answers: Na3P Sr3N2

Now:Finish side 1 of worksheetWork sections 1 - 4 on back of

worksheetWork homework problems

Name the cation firstthen name the anion

Example: Lithium FuorideMagnesium Carbonate

No

Name the cation firstPlace a roman numeral

Name the anionExample: Iron (II) Sulfate

Yes

Does the compound contain amultivalent ion

aka - transition metal orgroup B element

Ionic

Yes

Use prefixes to representthe number of atoms.

Example: H2O Dihydrogen MonoxideCO2 Cabon Dioxide

Molecular

No

Is there a metal?

Naming Compounds