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Chemical Bonds

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

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