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Chemical Bonds

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

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