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CHEM2A

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  • The formula Ca(NO3)2 tells us that one formula unit of this compound is composed of __ calcium atoms, __ nitrogen atoms, and __ oxygen atoms.
    one; two; six
    one; two; five
    two; two; six
    one; one; six
  • The formula PO4^:3- means that this ion is composed of:
    4 atoms phosphorus, 4 atoms oxygen, and 3 extra electrons
    1 atom phosphorus, 4 atoms oxygen, and 3 electrons lost
    1 atom phosphorus, 4 atoms oxygen, and 3 extra electrons
    4 atom phosphorus, 4 atoms oxygen, and 3 electrons lost
  • What is the name of AlCl3?
    aluminum(III) trichloride
    aluminum(III) chloride
    aluminum trichloride
    aluminum chloride
  • The element least likely to obey the octet rule in forming chemical bonds is
    boron
    carbon
    nitrogen
    fluorine
  • The molecule SiCl4 has a ________ shape.
    bent
    pyramidal
    tetrahedral
    linear
  • Elements in Period 3 or below don't always "obey" the octet rule because they ____.
    cannot use d orbitals for bonding.
    can use s and p orbitals for bonding.
    can use s, p, and d orbitals for bonding.
    cannot use s orbitals for bonding.
  • The formula for ammonium hydroxide is ________.
    NH4NO3
    NH4O
    NH4OH
    OHNH4
  • The name of S^2- is _______.
    sulfide ion.
    sulfite ion.
    sulfur.
    sulfate ion.
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