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Chemical Bonds

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

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