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Chemical Bonds

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

 
   
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