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Chemical Bonds

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

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