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Chemical Bonds

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

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