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Chemical Bonds

Practice Test
  1.Compounds that are hydrates contain what ingredient?  
  a.   hydrogen chloride  
  b.   chlorine  
  c.   nitrogen  
  d.   water  
  2.In a covalent bond, electrons are __________.  
  a.   destroyed  
  b.   gained  
  c.   shared  
  d.   lost  
  3.What kind of charge does an ionic compound carry?  
  a.   positive  
  b.   negative  
  c.   unknown  
  d.   neutral  
  4.A complex ion is __________.  
  a.   an ion with more than one atom  
  b.   an ion made from a large atom  
  c.   a single atom that has formed an ion  
  d.   only found in compounds  
  5.Chemical compounds are __________.  
  a.   less stable than their individual elements  
  b.   always stable  
  c.   more stable than their individual elements  
  d.   always unstable  
  6.The iodine ion I- carries what type of charge?  
  a.   positive  
  b.   both  
  c.   neutral  
  d.   negative  
  7.Is a molecule of hydrogen chloride (HCl) polar or nonpolar?  
  a.   nonpolar  
  b.   polar  
  c.   neither  
  d.   both  
  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.A binary compound made with phosphorus will end with the word __________.  
  a.   phosphite  
  b.   phosphide  
  c.   phosphorus  
  d.   phosphate  
  10.A polyatomic ion is another name for a __________ ion.  
  a.   neutral  
  b.   complex  
  c.   positive  
  d.   negative  
  11.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  
  12.When an atom's outer energy levels are not filled completely, the atom __________.  
  a.   is very stable  
  b.   is a noble gas  
  c.   cannot form a compound  
  d.   can gain, lose, or share electrons  
  13.Binary compounds are composed of __________ atoms.  
  a.   four  
  b.   one  
  c.   two  
  d.   many  
  14.For an ion, the oxidation number is __________.  
  a.   always negative  
  b.   the same as the charge on the ion  
  c.   zero  
  d.   one less than the charge on the ion  
  15.A compound __________.  
  a.   is a pure element  
  b.   is a combination of two or more elements  
  c.   is composed of only metals  
  d.   has the same properties as its parts  
  16.NaCl is the chemical formula for what?  
  a.   chlorine gas  
  b.   water  
  c.   sodium chloride  
  d.   sodium metal  
  17.When elements form bonds, it changes their __________ properties.  
  a.   physical  
  b.   mass  
  c.   chemical  
  d.   chemical and physical  
  18.In sodium chloride, which atom loses an electron?  
  a.   neither  
  b.   chloride  
  c.   salt  
  d.   sodium  
  19.How many electrons are shared in a double bond?  
  a.   two  
  b.   one  
  c.   one pair  
  d.   two pairs  
  20.The atom that contains the fewest electrons is __________.  
  a.   helium  
  b.   hydrogen  
  c.   water  
  d.   oxygen  

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