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Chemical Bonds

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

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