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Chemical Bonds

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

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