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4.E: Valence Electrons and Bonding (Exercises)

  • Page ID
    85157
  • Exercises

    1: Identify whether each compound(s) is/are ionic.

    1. NaI
    2. Au2CO3
    3. N2O
    4. SiO2
    Answer

    Only answers (a) and (b) are ionic compounds.  Both formulas begin with a metal (atom from the left side of the periodic table) ion.

    2: Identify whether each compound(s) is/are covalent.

    1. SiH3
    2. C6H5Cl
    3. KC2H3O2
    4. Ca(OH)2
    Answer

    Only answers (a) and (b) are covalent compounds.  Both formulas begin with nonmetals and/or metalloids (atoms from the right side of the table)

    3: Write the formula for each ionic compound.

    1. magnesium sulfite
    2. aluminum nitride
    3. mercury II hydroxide
    4. ammonium oxide
    Answer

    a. MgSO3  b.  AlN  c) Hg(OH)2  d)  (NH4)2O

    4: Write the formula for each covalent compound.

    1. iodine trichloride
    2. disulfur dibromide
    3. arsenic trioxide
    4. xenon hexafluoride
    Answer

    a.  ICl3   b.  S2Br2  c.  AsO3  d.  XeF6

    5: Which covalent species would be considered free radicals?

    1. hydrogen monoxide
    2. carbon dioxide
    3. phosphorus disulfide
    4. ammonia (NH3
    Answer
    1. silicon tetrafluoride
    2. nitrogen dioxide
    3. carbon disulfide
    4. diphosphorus pentoxide

    Answers

    1.

    2.

    3. 
     
    4. 
     
    1.  

      1. ICl3
      2. S2Br2
      3. AsO3
      4. XeF6
     
    1. H2O and NH3 (water and ammonia) (answers will vary)