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Chemical Bonds

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

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