Periodicity

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					Periodicity

  Chapters 6 and 10
  Key terms from both chapters and
   sentences should be in your notebook
   by Monday.
  Outlines should be in your notebook
   before Winter Break.
This is what Mendeleev knew in 1869.
   +1 +2         +3 +4              -2
                                                    Mendeleev
                                                    predicted that
                                                    eke-silicon and
                                                    eke-boron
                                                    would be
                                                    discovered,
                                                    (the atoms
                                                    in purple).
                                                    They were
                                                    discovered soon
                                                    after his prediction
                                                    was made. 50
                                                    years later, Moseley’s
                                                    work with X-rays
http://web.fccj.org/~ethall/2045/ch5/mendelev.htm   improved upon the
http://www.chemistry.co.nz/mendeleev.htm            Periodic Table.
http://www.genesismission.org/educate/scimodule/cosmic/ptable.html
Try this web site if you want to get your money’s worth from our government!

  Periodic Law
       The properties of the elements are a
         periodic function of their atomic
         numbers.
           Elements  with similar electron
            configurations are in the same column.
           These elements have similar chemical
            behavior.
           The way the behavior varies is predictable.

          http://www.chemistrycoach.com/periodic_tables.htm
          A comprehensive list of resources about periodic tables
                Alkaline Earth Metals




                                        Transition Metals
Alkali Metals




                                                       Inner Transition Metals
Alkali Metals

  end in s1
  react with water to form hydrogen gas
   and a hydroxide base.
  react with salts to form other salts.
  conduct heat and electricity
  gives electrons in chemical reactions.
  shiny, malleable, ductile,… in the
   uncombined form.
Alkaline Earth Metals
  end in s2
  may react with water to form hydrogen gas
   and a hydroxide base.
  Reacts with acid to form hydrogen gas and a
   salt.
  react with salts to form other salts.
  conduct heat and electricity
  gives electrons in chemical reactions
  shiny, malleable, ductile,… in the
   uncombined form.
Transition Metals
  end in s2dn
  may react with acid to form hydrogen gas and
   a salt.
  react with salts to form other salts.
  conduct heat and electricity
  shiny, malleable, ductile,… in the
   uncombined form.
  gives electrons in chemical reactions
  Many of these make colorful compounds.
Inner Transition Metals
  end in s2fn
  may react with acid to form hydrogen gas and
   a salt.
  may react with salts to form other salts.
  conduct heat and electricity
  shiny, malleable, ductile,… in the
   uncombined form.
  gives electrons during chemical reactions.
  Many of these (if not all) are radioactive.
Metalloids
  end in s2pn
  may react with salts to form other salts.
  may or may not conduct heat and electricity
  may or may not be shiny, malleable, ductile,
   dull, brittle,… in the uncombined form.
  Many of these are semiconductors and are
   used in computers.
  SiO2 is sand, glass, super-ball, breast implant
   – depending on how it is processed.
Nonmetals

  end in s2pn
  may react with salts to form other salts.
  do not conduct heat and electricity
  may be dull, brittle,… in the uncombined
   form.
  May react by sharing electrons or taking
   electrons.
  May be solid, liquid, or gas.
Noble Gases

  end in s2p6
  are gases
  do not generally engage in chemical
   reactions.
 Each Group will work with one days. This is worth It
You will present your topic in three periodic property. 100 points
will be your job to explain your topic so your
classmates feel comfortable with it.
 Page 251  255: Atomic         P258  262:
 and ionic radii                Ionization energy and
                                reaction tendencies
 P 255  257:                   P 263:
 Electron configuration and     Electron affinity and
 its relation to oxidation      reaction tendencies.
 numbers (also p141155)

   Define Concept      What is it?
   Illustrate Concept  How can I picture what you describe?
   Apply Concept.     What affect does this have?

				
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posted:12/2/2011
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