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Chemical Bonds

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

 
   
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