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Chemical Bonds

Practice Test
  1.When an atom's outer energy levels are not filled completely, the atom __________.  
  a.   is a noble gas  
  b.   can gain, lose, or share electrons  
  c.   cannot form a compound  
  d.   is very stable  
  2.A polyatomic ion is another name for a __________ ion.  
  a.   negative  
  b.   positive  
  c.   neutral  
  d.   complex  
  3.Chemical compounds are __________.  
  a.   less stable than their individual elements  
  b.   always unstable  
  c.   always stable  
  d.   more stable than their individual elements  
  4.Binary compounds are composed of __________ atoms.  
  a.   four  
  b.   two  
  c.   one  
  d.   many  
  5.In sodium chloride, which atom loses an electron?  
  a.   chloride  
  b.   neither  
  c.   sodium  
  d.   salt  
  6.For an ion, the oxidation number is __________.  
  a.   zero  
  b.   one less than the charge on the ion  
  c.   the same as the charge on the ion  
  d.   always negative  
  7.What is the difference between carbon monoxide and carbon dioxide?  
  a.   Carbon dioxide has two carbon atoms.  
  b.   Carbon monoxide has two carbon atoms.  
  c.   Carbon dioxide has only one oxygen atom.  
  d.   Carbon monoxide has only one oxygen atom.  
  8.Why is potassium iodine added to table salt?  
  a.   Table salt causes high blood pressure.  
  b.   Iodine is an element essential for health.  
  c.   Iodine is in the formula for table salt.  
  d.   to add to the flavor of salt  
  9.A compound __________.  
  a.   is composed of only metals  
  b.   has the same properties as its parts  
  c.   is a pure element  
  d.   is a combination of two or more elements  
  10.A complex ion is __________.  
  a.   a single atom that has formed an ion  
  b.   only found in compounds  
  c.   an ion made from a large atom  
  d.   an ion with more than one atom  
  11.The iodine ion I- carries what type of charge?  
  a.   positive  
  b.   neutral  
  c.   both  
  d.   negative  
  12.In general, noble gases react with __________.  
  a.   water  
  b.   other noble gases  
  c.   nothing  
  d.   metals  
  13.When elements form bonds, it changes their __________ properties.  
  a.   mass  
  b.   physical  
  c.   chemical and physical  
  d.   chemical  
  14.What kind of charge does an ionic compound carry?  
  a.   neutral  
  b.   positive  
  c.   negative  
  d.   unknown  
  15.Francium, which is in the same chemical family as sodium, will carry what type of charge?  
  a.   negative  
  b.   neutral  
  c.   positive  
  d.   both  
  16.NaCl is the chemical formula for what?  
  a.   sodium metal  
  b.   water  
  c.   chlorine gas  
  d.   sodium chloride  
  17.The atom that contains the fewest electrons is __________.  
  a.   hydrogen  
  b.   helium  
  c.   water  
  d.   oxygen  
  18.A binary compound made with phosphorus will end with the word __________.  
  a.   phosphorus  
  b.   phosphide  
  c.   phosphate  
  d.   phosphite  
  19.In a covalent bond, electrons are __________.  
  a.   lost  
  b.   destroyed  
  c.   shared  
  d.   gained  
  20.Is a molecule of hydrogen chloride (HCl) polar or nonpolar?  
  a.   neither  
  b.   polar  
  c.   nonpolar  
  d.   both  

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