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Chemical Bonds

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

 
   
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