Unit 3 review
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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”

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UNIT 3 REVIEW

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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 NO3-)


all TWO element compounds (two capital letters) end in –IDE, whether molecular or ionic

NF3 nitrogen trifluoride

CaCl2 calcium chloride


  • MOLECULAR COMPOUNDS:

    - start with a NON-METAL

    - use PREFIXES in the name

    P2O5

    diphosphorus pentoxide


  • IONIC COMPOUNDS:

    - start with a METAL

    - NO prefixes in name

    - if given name write SYMBOL and CHARGE above names to find formula


KF potassium fluoride

Mg2+ P3-

magnesium phosphide

Mg3P2


  • If the metal can have more than one charge, use ROMAN NUMERALS in the name:

    Cu2+ Cl-

    copper (II) chloride CuCl2


if non-metal is POLYATOMIC ION, compound ends in –ITE or –ATE:

KNO3 potassium nitrate

Na2SO4 sodium sulfate


  • write formula and then name for:

    N2O4


  • dinitrogen tetroxide


SeF2


  • selenium difluoride


B4C


tetraboron monocarbide


MgI2


  • magnesium iodide


Ag2S


  • silver sulfide


AlBr3


  • aluminum bromide


sodium oxide


Na2O


lithium phosphide


Li3P


O2


oxygen


beryllium arsenide


Be3As2


iron(II) sulfide


FeS


chromium (III) fluoride


CrF3


lead (IV) hydride


PbH4


NiN


nickel (III) nitride


MnO2


manganese (IV) oxide


TiCl3


titanium (III) chloride


LiNO3


LiNO3


Oxide ion


O2-


NH4F


ammonium fluoride


MgCO3


magnesium carbonate


calcium chlorate


calcium ion


Ca2+


Ca(ClO3)2


lithium phosphate


Li3PO4


aluminum nitrate


Al(NO3)3


Pb(NO3)2


lead(II) nitrate


nitrogen triiodide


NI3


sodium sulfide


Na2S


K3PO4


potassium phosphate


SrSO4


strontium sulfate


carbon tetrachloride


CCl4


barium hydroxide


Ba(OH)2


BBr3


boron tribromide


nickel (III) carbonate


Ni2(CO3)3


zinc oxide


ZnO


RbH


rubidium hydride


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