OB: to review the properties of metals, nonmetals, ionic compounds, and then…

Polyatomic IonsTake out your reference tables and

some paper for some notes.

Define the Properties…

LusterDuctileMalleableConducts electricityConducts heatPhase at room tempForms Cations?Forms Anions?Relative Melting pointParticle (atom, molecule, FU)

Property Metals Nonmetals Ionic compounds

Luster

Ductile

malleable

Conducts electricity

Conducts heat

Phase at room temp

Forms cations?

Forms anions?

Relative melting point

particles

Property Metals Nonmetals Ionic compounds

Luster Yes No No

Ductile Yes No No

Malleable Yes No No

Conducts electricity Yes No No

Conducts heat Yes No No

Phase at room temp Solid Solid, liquid, gas Solid

Forms cations? Yes No X

Forms anions? No Yes X

Relative melting point High Lowest Highest

Particles Atoms Atoms ordiatomic molecules Formula units

All of our polyatomic ions will be found on table E on the front page of the reference tables

They are multiple groups of atoms, acting as a single unit, with a charge, as an ION.

Most are anions, but the first few are cations.

Ammonium is common, the other 2 cations are much less common.

The anions are all equally common in our course.

Never change their names, ever.

Some are similar in formula (sulfite and sulfate) but very different in name. Be careful.

Lots have fun names to say out loud. Let’s say some now.

When naming the ionic compounds, we always say the cation first, then the anion.

These polyatomics can readily combine with the monoatomic ions from the periodic table.

Cations AnionsCompound

formulaNames

Li+1 CO3-2

Mg+2 ClO3-1

CaCrO4

SrCr2O7

NH4+1 OH-1

Cations AnionsCompound

formulaNames

Li+1 CO3-2 LiCO3 Lithium carbonate

Mg+2 ClO3-1 MgClO3 Magnesium chlorate

Ca+2 CrO4-2 CaCrO4 Calcium chromate

Sr+2 Cr2O7-2 SrCr2O7 Strontium dichromate

NH4+1 OH-1 NH4OH Ammonium hydroxide

Cations Anions Compound formula Names

Ammonium oxalate

AmmoniumPhosphide

Cesium sulfate

Cesium sulfite

Barium thiocyanate

Cations Anions Compound formula Names

NH4+1 C2O4

-2 (NH4)2C2O4 Ammonium oxalate

NH4+1 P-3 (NH4)3P3

AmmoniumPhosphide

Cs+1 SO4-3 Cs2SO4 Cesium

sulfate

Cs+1 SO3-3 Cs2SO3

Cesium sulfite

Ba+2 SCN-1 Ba(SCN)2Barium

thiocyanate

Cations AnionsCompound

formulaNames

(NH4) 2SO4

NH4HCO3

NaCN

KOH

Ba(SCN) 2

Cations AnionsCompound

formulaNames

NH4+1 SO4

-3 (NH4) 2SO4Ammonium

sulfate

NH4+1 HCO3

-1 NH4HCO3

Ammonium hydrogen carbonate

Na+1 CN-1 NaCN Sodium cyanide

K+1 OH-1 KOHPotassium hydroxide

Ba+2 SCN-1 Ba(SCN) 2Barium

thiocyanate

Cations AnionsCompound

formulaNames

Na+1 C2H3O2-1

Ca+2 MnO4-1

Sr+2 O2-2

Al+3 MnO4-1

Be+2 PO4-3

Cations AnionsCompound

formulaNames

Na+1 C2H3O2-1 NaC2H3O2 Sodium acetate

Ca+2 MnO4-1 Ca(MnO4)2

Calcium permanganate

Sr+2 O2-2 SrO2

Strontium peroxide

Al+3 MnO4-1 Al(MnO4)3

Aluminum permanganate

Be+2 PO4-3 Be3(PO4)2

Beryllium phosphate