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Physical Science Unit 4 Exam Review

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  • Balance the following equation: P + O2 ---> P4O10
    4P + 5O2 ---> P4O10
  • Where are the PRODUCTS in a chemical reaction? Left or Right side?
    Products= Right side of the reaction (C + D)
  • Which formula represents elements that form covalent bonds? And WHY? H2, Cl2, N2
    H2, Cl2, N2, all covalent bonding.
  • What is the chemical formula for Magnesium Oxide?
    MgO
  • What is covalent bonding? And what are THREE examples of covalent bonds
    Two nonmetals bonded together. Example: CO, NH, HF
  • Balance the following equation: Al2O3 ---> Al + O2
    2AlO3 ---> 2Al + 3O2
  • What is ionic bonding? And what are THREE examples of ionic bonds?
    Metal + Nonmetal bonded together. Example: NaCl, MgS, LiBr
  • What is the octet rule?
    Atoms form compounds to give them eight valence electrons.
  • Which formula represents elements that form ionic bonds? And WHY? O2, Br2, KMnO4
    KMnO4, metals + nonmetal
  • Balance the following equation: Mg + O2 ---> MgO
    2Mg + O2 ---> 2MgO
  • What is the chemical formula for Iron (IIl) Bromide?
    FeBr3
  • Label the reactants (R) for the following reaction: MgCl2 + Li2CO3 ---> MgCO3 + 2 LiCl
    Reactants: MgCl2 + Li2CO3
  • Balance the following equation: Fe + H2O ---> Fe3O4 + H2
    3Fe + 4H2O ---> Fe3O4 + 4H2
  • What is the chemical name for FeS
    Iron (II) Sulfide
  • Do Ionic bonds SHARE or TRANSFER electrons?
    Ionic bonds TRANSFER electrons.
  • Label the reactants (R) for the following reaction: CaCO3 ---> CaO + CO2
    Reactants: CaCO3
  • What is the chemical name for Cu3N2
    Copper (II) Nitride
  • Where are the REACTANTS in a chemical reaction? Left or Right side?
    Reactants= Left side of the reaction (A + B)
  • What oxidation number does calcium have?
    +2
  • What is the chemical formula for Vanadium (V) Phosphide?
    V3P5
  • Balance the following equation: C2H6 + O2 ---> CO2 + H2O
    2C2H6 + 7O2 ---> 4CO2 + 6H2O
  • What is the chemical name for Pb2S4?
    Lead (IV) Sulfide
  • Label the products (P) for the following reaction: Pb + FeSO4 ---> PbSO4 + Fe
    Products: PbSO4 + Fe
  • Balance the following equation: BaCl2 + H2SO4 ---> BaSO4 + HCl
    BaCl2 + H2SO4 ---> BaSO4 + 2HCl
  • What is the reaction formula for a chemical reaction?
    Reaction Formula: A + B -------> C + D
  • What is the chemical name for KBr?
    Potassium Bromide
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