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Chemical Bonds

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

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