UNIT 3 REVIEW

Elements  If the formula has ONE CAPITAL LETTER, it is an element, and its name is what is found on the periodic table (regardless of subscript)

IONS  Positive ions are named for the element  Na+ is the ‘sodium ion’  Negative ions end in ‘-ide’  Cl- is the “chloride ion”  Check table E for polyatomic ions (like NO 3 - )

all TWO element compounds (two capital letters) end in – IDE, whether molecular or ionic NF 3 nitrogen trifluoride CaCl 2 calcium chloride

 MOLECULAR COMPOUNDS: - start with a NON-METAL - start with a NON-METAL - use PREFIXES in the name - use PREFIXES in the name P 2 O 5 diphosphorus pentoxide diphosphorus pentoxide

 IONIC COMPOUNDS: - start with a METAL - start with a METAL - NO prefixes in name - NO prefixes in name - if given name write SYMBOL and CHARGE above names to find formula - if given name write SYMBOL and CHARGE above names to find formula

KF potassium fluoride Mg 2+ P 3- Mg 2+ P 3- magnesium phosphide Mg 3 P 2 Mg 3 P 2

 If the metal can have more than one charge, use ROMAN NUMERALS in the name: Cu 2+ Cl - Cu 2+ Cl - copper (II) chloride CuCl 2

if non-metal is POLYATOMIC ION, compound ends in –ITE or –ATE: KNO 3 potassium nitrate Na 2 SO 4 sodium sulfate

 write formula and then name for: N 2 O 4

 dinitrogen tetroxide

SeF 2

 selenium difluoride

B4CB4CB4CB4C

tetraboron monocarbide

MgI 2

 magnesium iodide

Ag 2 S

 silver sulfide

AlBr 3

 aluminum bromide

sodium oxide

Na 2 O

lithium phosphide

Li 3 P

O2O2

oxygen

beryllium arsenide

Be 3 As 2

iron(II) sulfide

FeS

chromium (III) fluoride

CrF 3

lead (IV) hydride

PbH 4

NiN

nickel (III) nitride

MnO 2

manganese (IV) oxide

TiCl 3

titanium (III) chloride titanium (III) chloride

LiNO 3

Oxide ion

O 2-

NH 4 F

ammonium fluoride ammonium fluoride

MgCO 3 MgCO 3

magnesium carbonate

calcium chlorate calcium chlorate

calcium ion calcium ion

Ca 2+ Ca 2+

Ca(ClO 3 ) 2 Ca(ClO 3 ) 2

lithium phosphate lithium phosphate

Li 3 PO 4 Li 3 PO 4

aluminum nitrate

Al(NO 3 ) 3

Pb(NO 3 ) 2

lead(II) nitrate lead(II) nitrate

nitrogen triiodide

NI 3

sodium sulfide

Na 2 S Na 2 S

K 3 PO 4

potassium phosphate

SrSO 4 SrSO 4

strontium sulfate

carbon tetrachloride

CCl 4

barium hydroxide

Ba(OH) 2

BBr 3

boron tribromide

nickel (III) carbonate

Ni 2 (CO 3 ) 3 Ni 2 (CO 3 ) 3

zinc oxide

ZnO

RbH

rubidium hydride