Atomic Theory Lecture Theory Lecture Today New unit: Atoms Ch 3-4 Get a new TOC ! Goes on page 39 . Let’s Take a Trip Through Time! ... John Dalton 1766-1844 ...

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  • Atomic Theory Lecture Today New unit:

    Atoms

    Ch 3-4

    Get a new

    TOC !

    Goes on page

    39

  • Lets Take a Trip Through Time!

    Notes on page 45

  • 1964 Quarks-Cal Tech

  • 1932

    James Chadwick

    1891-1974

    discovers the

    neutron

  • Ernst Schrdinger 1887-1961

    Quantum Mechanical

    Model 1926

    Electrons are in probability

    zones called orbitals, not

    orbits and the location

    cannot be pinpointed

    Electrons are particles and

    waves at the same time

    Developed quantum

    numbers based on theories

    of Einstein and Planck

    1930 Schrodinger

    developed mathematical

    model

    Werner Heisenberg 1901-1976

    http://en.wikipedia.org/wiki/Image:Erwin_Schr%C3%B6dinger.jpg

  • Orbitals

  • Quantum Mechanical Theory Electron in a Hydrogen atom

    Pick A

    Candy!

    http://en.wikipedia.org/wiki/Image:HAtomOrbitals.png

  • Niels Bohr

    1885-1962

    Planetary Model 1913

    Nucleus surrounded by

    orbiting electrons at

    different energy levels

    Electrons have definite

    orbits

    Utilized Plancks

    Quantum Energy theory

    Worked on the Manhattan

    Project (US atomic bomb)

    http://en.wikipedia.org/wiki/Image:Niels_Bohr.jpg

  • Bohrs Model

    http://en.wikipedia.org/wiki/Image:Bohr-atom-PAR.svg

  • Bohr Model for Nitrogen

    Pick A Candy!

  • Ernest Rutherford

    1871-1937

    Nucleus Theory 1910

    alpha particle gold foil

    experiment

    An atoms mass is

    mostly in the nucleus

    The nucleus has a

    positive charge

    (Moseley)

    Electrons in fixed orbit

  • Alpha Particle Experiment

    Aka: Gold Foil Experiment

  • Rutherford Model

    Pick a Candy!

    http://upload.wikimedia.org/wikipedia/commons/e/e1/Stylised_Lithium_Atom.svg

  • J.J. Thomson

    1856-1940

    Discovered electron

    1897 Cathode Ray

    Experiment

    Plum Pudding model

    1904

    Electrons in a soup of

    positive charges

    Discovered isotopes

    1913

    http://en.wikipedia.org/wiki/Image:Jj-thomson2.jpg

  • JJ Thompsons Ideas

  • Cathode Ray Tube Experiment

  • Plum Pudding Model

    Pick a Candy!

    http://en.wikipedia.org/wiki/Image:Plum_pudding_atom.svg

  • John Dalton

    1766-1844 Introduced his ideas in 1803

    Each element is composed of extremely small particles called atoms

    All the atoms of a given element are identical, but they differ from those of any other element

    Atoms are neither created nor destroyed in any chemical reaction

    A given compound always has the same relative numbers and kinds of atoms

    http://en.wikipedia.org/wiki/Image:Johndalton.jpg

  • Daltons Model

    Pick a Candy !

  • Democritus

    460 370 B.C. There are various basic

    elements from which all matter is made

    Everything is composed of small atoms moving in a void

    Some atoms are round, pointy, oily, have hooks, etc. to account for their properties

    Ideas rejected by leading philosophers because void = no existence

    http://en.wikipedia.org/wiki/Image:Demokrit.jpeg

  • First Concept of an Atom

    Pick a Candy !

    http://images.google.com/imgres?imgurl=http://www.uoregon.edu/~ch111/images/democritus.gif&imgrefurl=http://www.uoregon.edu/~ch111/L5.htm&h=225&w=150&sz=8&hl=en&start=5&um=1&tbnid=BVFhvE_VkFy4ZM:&tbnh=108&tbnw=72&prev=/images%3Fq%3Ddemocritus%2Batomic%2Bmodel%26svnum%3D10%26um%3D1%26hl%3Den%26rls%3DGGLD,GGLD:2004-22,GGLD:en%26sa%3DG

  • 400 BC 1803 1904 1910 1913 1926 1932

    Niels

    Bohr

    J J

    Thomson Democratus

    John

    Dalton

    Schroedinger

    / Heisenberg

    Ernest

    Rutherford

    Atomic Theory

    Caltech-

    Quarks

    1964

    Chadwick

    http://en.wikipedia.org/wiki/Image:Demokrit.jpeghttp://en.wikipedia.org/wiki/Image:Johndalton.jpghttp://en.wikipedia.org/wiki/Image:Jj-thomson2.jpghttp://en.wikipedia.org/wiki/Image:Niels_Bohr.jpghttp://en.wikipedia.org/wiki/Image:Erwin_Schr%C3%B6dinger.jpghttp://rds.yahoo.com/_ylt=A0S0204jNtVKcKsAjTWJzbkF;_ylu=X3oDMTBpdnJhMHUzBHBvcwMxBHNlYwNzcgR2dGlkAw--/SIG=1i6t8l67s/EXP=1255573411/**http%3A//images.search.yahoo.com/images/view%3Fback=http%253A%252F%252Fimages.search.yahoo.com%252Fsearch%252Fimages%253Fp%253DGell-Mann%252Band%252BZweig%2526ei%253DUTF-8%2526fr%253Datt-ie8%2526fr2%253Dtab-web%26w=160%26h=218%26imgurl=www.newgenevacenter.org%252F09_Biography%252Fgell-mann.jpg%26rurl=http%253A%252F%252Fwww.newgenevacenter.org%252F09_Biography%252F09b_Thinkers%252F20b-science.htm%26size=7k%26name=gell%2Bmann%2Bjpg%26p=Gell-Mann%2Band%2BZweig%26oid=3721a46227a4077e%26fr2=tab-web%26no=1%26tt=15%26sigr=128ai0ojb%26sigi=11il2sit5%26sigb=13218sofu

  • Next Atomic Theory

    Which one of you will develop a

    better theory and win the Nobel

    Prize?

    Pick Your Favorite Candy and

    Enjoy!

  • Atomic Theories Timeline

    Name Democritus Dalton Thomson Rutherford Bohr Schrdinger Heisenberg

    Time

    Frame

    Key

    Points

    Candy

    Model

    P.44

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