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Chemical Bonds

Practice Test
  1.For an ion, the oxidation number is __________.  
  a.   the same as the charge on the ion  
  b.   always negative  
  c.   one less than the charge on the ion  
  d.   zero  
  2.The iodine ion I- carries what type of charge?  
  a.   positive  
  b.   both  
  c.   negative  
  d.   neutral  
  3.A binary compound made with phosphorus will end with the word __________.  
  a.   phosphorus  
  b.   phosphide  
  c.   phosphate  
  d.   phosphite  
  4.In sodium chloride, which atom loses an electron?  
  a.   sodium  
  b.   salt  
  c.   chloride  
  d.   neither  
  5.A compound __________.  
  a.   is a combination of two or more elements  
  b.   is composed of only metals  
  c.   has the same properties as its parts  
  d.   is a pure element  
  6.Why is potassium iodine added to table salt?  
  a.   to add to the flavor of salt  
  b.   Iodine is an element essential for health.  
  c.   Iodine is in the formula for table salt.  
  d.   Table salt causes high blood pressure.  
  7.Binary compounds are composed of __________ atoms.  
  a.   two  
  b.   many  
  c.   four  
  d.   one  
  8.When elements form bonds, it changes their __________ properties.  
  a.   physical  
  b.   mass  
  c.   chemical and physical  
  d.   chemical  
  9.A polyatomic ion is another name for a __________ ion.  
  a.   positive  
  b.   negative  
  c.   complex  
  d.   neutral  
  10.Compounds that are hydrates contain what ingredient?  
  a.   nitrogen  
  b.   hydrogen chloride  
  c.   water  
  d.   chlorine  
  11.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.  
  12.In general, noble gases react with __________.  
  a.   water  
  b.   metals  
  c.   other noble gases  
  d.   nothing  
  13.In a covalent bond, electrons are __________.  
  a.   shared  
  b.   gained  
  c.   lost  
  d.   destroyed  
  14.Chemical compounds are __________.  
  a.   always unstable  
  b.   always stable  
  c.   less stable than their individual elements  
  d.   more stable than their individual elements  
  15.A complex ion is __________.  
  a.   a single atom that has formed an ion  
  b.   only found in compounds  
  c.   an ion made from a large atom  
  d.   an ion with more than one atom  
  16.NaCl is the chemical formula for what?  
  a.   chlorine gas  
  b.   sodium chloride  
  c.   water  
  d.   sodium metal  
  17.What kind of charge does an ionic compound carry?  
  a.   positive  
  b.   neutral  
  c.   unknown  
  d.   negative  
  18.The atom that contains the fewest electrons is __________.  
  a.   water  
  b.   helium  
  c.   oxygen  
  d.   hydrogen  
  19.Francium, which is in the same chemical family as sodium, will carry what type of charge?  
  a.   both  
  b.   neutral  
  c.   positive  
  d.   negative  
  20.How many electrons are shared in a double bond?  
  a.   two pairs  
  b.   one pair  
  c.   one  
  d.   two  

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