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Chemical Bonds

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

 
   
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