SuperMolecule XXXIX

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SuperMolecule XXXIX
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In the Playoffs

• Well known for their success in lighting up the
  conductivity tester
• Ionic Compound-ers
• Introduced to us by sucrose, sweet but unable to
  light the conductivity tester
• Molecular Compound-ers

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Are You Ready?

• Take out your composition books!
• Take out your pens and pencils!
• Its the SuperMolecule XXXIX Experience!

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Warm up Give the stats for the Ionic Compound
Team

• Team captains
• Class of elements in the formula
• Positive and negative ions
• Write the formula for each player.

• sodium chloride
• copper (II) sulfate
• Metal and nonmetal
• Na and Cl-
• Cu2 and SO42-
• NaCl and CuSO4

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and the stats for the Molecular Team

• Team captains
• Class of elements in the formula
• Number of each atom in the formulas
• Write the formula for each captain.

• carbon dioxide
• sulfur trioxide
• Only nonmetals
• 1 carbon two oxygens
• 1 sulfur three oxygens
• CO2 and SO3

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Tips for the Fans

• Heres how you can tell whether a team member
  from the ionic compound or molecular compound is
  being described.
• Ionic names use Roman numerals to count charge of
  the ion.
• Ionic names use suffixes, ide, ite, ate to
  describe the ion.
• Molecule names use Greek prefixes as counters of
  the number of atoms in the formula.

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Todays Lesson is sponsored by the makers of
Molecular Compounds

• Standard Name and write formulas for compounds
• Rubric What is good enough?
• Formulas contain correct number of nonmetal atoms
• Names use appropriate Greek prefixes to count
  atoms
• Ion formula names do not use Greek prefixes

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Rules for Binary (two element) Molecular Compounds

• First word
• If only one atom, name element
• If more than one atom, use prefix element name
• Second word
• Use a prefix to count the atoms
• Combine the first and second words.

• Examples
• CS2 carbon
• N2O3 dinitrogen
• CS2 disulfide
• N2O3 trioxide
• CS2 carbon disulfide
• N2O3 dinitrogen trioxide

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Greek Counting Prefixes

• 1
• 2
• 3
• 4
• 5
• 6

• mono
• di
• tri
• tetra
• penta
• hexa

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Practice NamingName the following compounds.If
the compounds are ionic, do not name them.Write
an X.

• CO
• CO2
• Na2CO3
• AsCl3
• N2O5

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Now run the reverse play!Write the formula from
the name.

• Nitrogen monoxide
• Beryllium dichloride
• Diphosphorus trioxide
• Dihydrogen oxide
• Hydrogen chloride

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Compounds with H and a nonmetal do not follow the
Greek rule!

• Compounds with hydrogen
• No prefixes
• And then theres dihydrogen monoxide also called
  dihydrogen oxide

• H2S hydrogen sulfide
• H2O water
• H2O2 hydrogen peroxide
• NH3 ammonia

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• Concluding Assignment
• Write a 30 second ad in which you announce the
  names of a player on the Molecular Compound Team.
• Specify the following
• The name of the player.
• The formula of the player.
• How the players name can be distinguished from
  one on the Ionic Compound Team.
• Make your announcement today!

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Practice Session

• Complete the worksheet for molecular compounds
• Study pages 211-213 in Modern Chemistry.