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Chemical Bonds

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

 
   
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