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Chemical Bonds

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

 
   
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