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Chemical Bonds

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

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