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Chemical Bonds

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

 
   
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