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Chapter 4: The Periodic Table. Pgs. Pgs. 114 – 155 in your book. Happy Monday! Welcome back!. YOU NEED YOUR BOOKS TODAY – GO GET THEM NOW !! Packet O Fun – p1, intro activity – work with the people around you. Read pgs. 116-118 in book Complete p2 in P of F Notes.

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Chapter 4: The Periodic Table


Pgs. 114 – 155 in your book

happy monday welcome back
Happy Monday! Welcome back!
  • Packet O Fun – p1, intro activity – work with the people around you.
  • Read pgs. 116-118 in book
    • Complete p2 in P of F
  • Notes
history of the periodic table
History of the Periodic Table
  • In this chapter we are studying the periodic table.
  • As you read, the credit for the modern periodic table goes to Dmitri Mendeleev.
  • Mendeleev recognized that there were repeating patterns in the periodic table and he organized the table around this periodicity.
john newlands 1865 english chemist
John Newlands 1865: English Chemist
  • Arranged the known elements according to
    • Physical and chemical properties &
    • in order of increasing atomic mass
  • Law of Octaves/ Rule of Eight
    • All elements in a given row had similar properties and this pattern repeated every eight elements
dmitri mendeleev 1869 russian chemist
Dmitri Mendeleev 1869: Russian Chemist
  • Invented the first Periodic Table
  • Organized the 63 known elements in vertical columns according to their properties
  • Two interesting things came from this:
    • Gaps
    • Elements did not necessarily fit according to atomic mass
henry moseley 1909 english chemist
Henry Moseley 1909: English Chemist
  • Looked at x-ray spectra
    • Spectral lines were correlated to atomic number
  • Led to the current organization of the PT according to
    • Increasing atomic number
  • P of F p.4: Valence Electrons / Lewis Dot Structures
  • Lab! Periodic Families 
periodic law
Periodic Law
    • Repeating physical and chemical properties change periodically with their atomic #
  • Modern term for Mendeleev’s “chemical periodicity”
  • Why does this happen?
valence electrons
Valence Electrons
  • Electrons that are found in the outermost shell of an atom and that determine the atom’s chemical properties
  • Participate in reactions with other atoms
  • The s and p electrons at the highest energy level
valence electron practice
Valence Electron Practice
  • Practice determining the number of valence electrons using p.4 in your Packet O Fun!!
  • CW/HW: p5&6 – Valence electrons & Lewis Dot Structures
lab periodic table families lab
Lab: Periodic Table Families Lab
  • Lets go to the lab!!
  • What do we notice is going on??