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Chemical Bonds

Practice Test
  1.Binary compounds are composed of __________ atoms.  
  a.   many  
  b.   one  
  c.   four  
  d.   two  
  2.The iodine ion I- carries what type of charge?  
  a.   positive  
  b.   neutral  
  c.   negative  
  d.   both  
  3.A compound __________.  
  a.   is a pure element  
  b.   is a combination of two or more elements  
  c.   is composed of only metals  
  d.   has the same properties as its parts  
  4.The atom that contains the fewest electrons is __________.  
  a.   oxygen  
  b.   helium  
  c.   water  
  d.   hydrogen  
  5.In general, noble gases react with __________.  
  a.   nothing  
  b.   other noble gases  
  c.   water  
  d.   metals  
  6.Is a molecule of hydrogen chloride (HCl) polar or nonpolar?  
  a.   both  
  b.   neither  
  c.   polar  
  d.   nonpolar  
  7.When elements form bonds, it changes their __________ properties.  
  a.   chemical and physical  
  b.   mass  
  c.   chemical  
  d.   physical  
  8.For an ion, the oxidation number is __________.  
  a.   the same as the charge on the ion  
  b.   one less than the charge on the ion  
  c.   zero  
  d.   always negative  
  9.In a covalent bond, electrons are __________.  
  a.   lost  
  b.   shared  
  c.   destroyed  
  d.   gained  
  10.How many electrons are shared in a double bond?  
  a.   two pairs  
  b.   one pair  
  c.   two  
  d.   one  
  11.Why is potassium iodine added to table salt?  
  a.   Iodine is an element essential for health.  
  b.   Iodine is in the formula for table salt.  
  c.   to add to the flavor of salt  
  d.   Table salt causes high blood pressure.  
  12.A polyatomic ion is another name for a __________ ion.  
  a.   negative  
  b.   neutral  
  c.   positive  
  d.   complex  
  13.Francium, which is in the same chemical family as sodium, will carry what type of charge?  
  a.   negative  
  b.   positive  
  c.   both  
  d.   neutral  
  14.A complex ion is __________.  
  a.   a single atom that has formed an ion  
  b.   an ion with more than one atom  
  c.   only found in compounds  
  d.   an ion made from a large atom  
  15.Chemical compounds are __________.  
  a.   less stable than their individual elements  
  b.   always unstable  
  c.   always stable  
  d.   more stable than their individual elements  
  16.A binary compound made with phosphorus will end with the word __________.  
  a.   phosphorus  
  b.   phosphide  
  c.   phosphite  
  d.   phosphate  
  17.What is the difference between carbon monoxide and carbon dioxide?  
  a.   Carbon dioxide has only one oxygen atom.  
  b.   Carbon monoxide has only one oxygen atom.  
  c.   Carbon monoxide has two carbon atoms.  
  d.   Carbon dioxide has two carbon atoms.  
  18.NaCl is the chemical formula for what?  
  a.   sodium metal  
  b.   water  
  c.   chlorine gas  
  d.   sodium chloride  
  19.What kind of charge does an ionic compound carry?  
  a.   negative  
  b.   unknown  
  c.   neutral  
  d.   positive  
  20.In sodium chloride, which atom loses an electron?  
  a.   neither  
  b.   salt  
  c.   sodium  
  d.   chloride  

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