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Compound Names and Formulas


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  • Uploaded On 04-06-2012

Compound Names and Formulas. Binary Ionic Compounds Binary Molecular Compounds Polyatomic Ionic Compounds Organic Hydrocarbons Acids. Binary Ionic Compounds. Compounds composed of a metal cation and a nonmetal anion First name is the name of the metal

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Compound Names and Formulas

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Compound names and formulas l.jpg

Compound Names and Formulas

  • Binary Ionic Compounds

  • Binary Molecular Compounds

  • Polyatomic Ionic Compounds

  • Organic Hydrocarbons

  • Acids


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BinaryIonic Compounds

  • Compounds composed of a metal cation and a nonmetal anion

  • First name is the name of the metal

  • Second name is the name of the nonmetal with an ide suffix

  • Ex. NaCl is sodium chloride


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Molecular Binary compounds

  • Composed of two elements both of which are nonmetals.

  • No ions present

  • First name is name of the first element with prefix

  • Second name is name of second element with prefix

  • Prefix indicates subscript number: mono, di, tri, tetra, penta, hexa, hepta, octa, nona and deca

  • Ex: Carbon monoxide – CO2


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Polyatomic Ionic Compounds

  • Composed of metal cation and anion made up of two or more nonmetal atoms with a net negative charge

  • First name is name of metal cation

  • Second name is name of polyatomic anion

  • Ex. Sodium sulfate – Na2SO4


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Organic Compounds

  • Hydrocarbons are made up of carbon and hydrogen atoms

  • Alkanes have the formula: CnH2n+2

  • Prefix defines the n value: n=1-9 meth, eth, pro, but, pent, hex, hept, oct, non, and dec

  • Name ends with ane suffix

  • Ex: methane – CH4


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Binary Acids

  • All acids contain hydrogen ion: H+

  • In binary acids the anions is a monoatomic nonmetal anion

  • Generic formula: HA

  • Prefix: hydroSuffix: ic

  • Ex. Hydrochloric acid - HCl


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Polyatomic Acids

  • All acids contain hydrogen ion: H+

  • In polyatomic acids the anion is a polyatomic anion

  • Generic formula: HA

  • Prefix: none(unless polyatomic anion name has one)Suffix: ic(ate) or ous(ite)

  • Ex. chloric acid – HClO3

  • Ex: hypochlorous acid – HClO


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Writing formula for ionic compounds from formula

  • MxAy will be MyAx

  • Example: Calcium(2+) nitrate(1-) – Ca(NO3)2

  • Ammonium(1+) carbonate (2-) – (NH4)2CO3


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Writing Molecular formula from name for binary molecular formulas

  • Prefix indicates subscripts for that element

  • Dinitrogen pentoxide: N2O5


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Writing Alkane formula from name

  • Prefix indicates carbon subscript, H subscript is 2n+2

  • Ethane: C2H6


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Writing Acid Formula from Name

  • First determine if it is binary, it will have a hydro prefix and ic suffix

  • All acid formulas begin with hydrogen ion

  • Treat them like an ionic binary compound

  • Determine anion element and charge

  • Ex: hydrosulfuric acid – H2S


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Polyatomic acids

  • Determine the anion and its charge

  • Treat it like a polyatomic ionic compound

  • Ex: nitric acid – HNO3

  • Ex: phosphoric acid – H3PO4


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Quiz Time!


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Identify the formula for:barium nitrate

  • A. Ba3N2

  • B. Ba(NO2)2

  • C. BaNO2

  • D. BaNO3

  • E. Ba(NO3)2


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Identify the formula for:chromium (III) phosphate

  • A. Cr3PO3

  • B. Cr3(PO4)2

  • C. Cr2(PO4)3

  • D. CrPO4

  • E. Cr3(PO4)3


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Identify the formula for:Ammonium nitrate

  • A. NH4NO3

  • B. NH4NO2

  • C. NH3NO3

  • D. NH3NO2

  • E. (NH4)NO2


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Identify the formula for:Copper (II) bromide

  • A. CuBr

  • B. CuBrO3

  • C. Cu(BrO3)2

  • D. CuBr2

  • E. Cu(BrO4)2


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Identify the formula for:Copper (II) bromide

  • A. CuBr

  • B. CuBrO3

  • C. Cu(BrO3)2

  • D. CuBr2

  • E. Cu(BrO4)2


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Identify the formula for:Sulfur Hexafluoride

  • A. SF

  • B. SF6

  • C. SF4

  • D. S4F6

  • E. SF8


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Identify the formula for:Octane

  • A. C6H6

  • B. C6H12

  • C. C8H8

  • D. C8H16

  • E. C8H18


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Identify the formula for:Hydroiodic Acid

  • A. HI

  • B. H2I

  • C. HIO3

  • D. HIO2

  • E. HIO4


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Identify the formula for:Sulfuric Acid

  • A. HS

  • B. H2S

  • C. H2SO4

  • D. H2SO3

  • E. H3SO3


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Identify the formula for:Tetraphosphorus Decoxide

  • A. PO5

  • B. P2O5

  • C. P4O8

  • D. P4O10

  • E. P5O10