Chapter 4: The Periodic Table
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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

John newlands law of octaves

John Newlands—Law of Octaves

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

Dmitri mendeleev

Dmitri Mendeleev

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

Henry mosley

Henry Mosley



  • 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??

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