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Chemical Bonds

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

 
   
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