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Chemical Bonds

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

 
   
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