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Chemical Bonds

Practice Test
  1.A binary compound made with phosphorus will end with the word __________.  
  a.   phosphite  
  b.   phosphorus  
  c.   phosphide  
  d.   phosphate  
  2.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.  
  3.Is a molecule of hydrogen chloride (HCl) polar or nonpolar?  
  a.   neither  
  b.   both  
  c.   nonpolar  
  d.   polar  
  4.When elements form bonds, it changes their __________ properties.  
  a.   physical  
  b.   chemical and physical  
  c.   mass  
  d.   chemical  
  5.In a covalent bond, electrons are __________.  
  a.   destroyed  
  b.   lost  
  c.   shared  
  d.   gained  
  6.NaCl is the chemical formula for what?  
  a.   water  
  b.   sodium chloride  
  c.   chlorine gas  
  d.   sodium metal  
  7.How many electrons are shared in a double bond?  
  a.   two pairs  
  b.   one pair  
  c.   two  
  d.   one  
  8.Binary compounds are composed of __________ atoms.  
  a.   many  
  b.   four  
  c.   two  
  d.   one  
  9.A complex ion is __________.  
  a.   a single atom that has formed an ion  
  b.   an ion made from a large atom  
  c.   only found in compounds  
  d.   an ion with more than one atom  
  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.Francium, which is in the same chemical family as sodium, will carry what type of charge?  
  a.   negative  
  b.   neutral  
  c.   positive  
  d.   both  
  12.What is the difference between carbon monoxide and carbon dioxide?  
  a.   Carbon monoxide has only one oxygen atom.  
  b.   Carbon dioxide has only one oxygen atom.  
  c.   Carbon dioxide has two carbon atoms.  
  d.   Carbon monoxide has two carbon atoms.  
  13.A compound __________.  
  a.   is a combination of two or more elements  
  b.   is a pure element  
  c.   is composed of only metals  
  d.   has the same properties as its parts  
  14.What kind of charge does an ionic compound carry?  
  a.   neutral  
  b.   positive  
  c.   unknown  
  d.   negative  
  15.For an ion, the oxidation number is __________.  
  a.   always negative  
  b.   zero  
  c.   one less than the charge on the ion  
  d.   the same as the charge on the ion  
  16.A polyatomic ion is another name for a __________ ion.  
  a.   negative  
  b.   complex  
  c.   positive  
  d.   neutral  
  17.The iodine ion I- carries what type of charge?  
  a.   neutral  
  b.   both  
  c.   positive  
  d.   negative  
  18.When an atom's outer energy levels are not filled completely, the atom __________.  
  a.   is very stable  
  b.   can gain, lose, or share electrons  
  c.   is a noble gas  
  d.   cannot form a compound  
  19.The atom that contains the fewest electrons is __________.  
  a.   hydrogen  
  b.   water  
  c.   helium  
  d.   oxygen  
  20.Compounds that are hydrates contain what ingredient?  
  a.   chlorine  
  b.   nitrogen  
  c.   water  
  d.   hydrogen chloride  

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