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Chemical Bonds

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

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