Atomic StructureOpt

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Atomic structure Mrs Griffiths Wellington School 100’s of free ppt’s from www.pptpoint.com library
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Atomic Structure
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The structure of the atom ELECTRON –  negative, mass  nearly nothing PROTON –  positive, same mass  as neutron (“1”) NEUTRON –  neutral, same mass  as proton (“1”) The Ancient Greeks used to believe that everything was made  up of very small particles.  I did some experiments in 1808 that  proved this and called these particles ATOMS: Dalton
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The Atom Nucleus Electron Shell or Orbit
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The Atom Hydrogen Proton Electron Hydrogen has one proton, one electron and NO neutrons
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The Atom Helium Electron Proton Neutron Helium has two electrons, two protons and two neutrons
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Mass and atomic number Particle Relative Mass Relative Charge Proton 1 1 Neutron 1 0 Electron 0 -1 MASS NUMBER = number of protons +  number of neutrons SYMBOL PROTON NUMBER = number of protons  (obviously)
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The Atom Helium Electron Proton Neutron Helium has two electrons, two protons and two neutrons
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The Atom Lithium Protons Neutrons Electrons
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The Atom Beryllium Protons Neutrons Electrons Beryllium has four electrons, four protons and five neutrons.
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The Atom Boron Protons Neutrons Electrons Boron has five electrons, five protons and six neutrons.
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The Atom Carbon Protons Neutrons Electrons Carbon has six electrons, six protons and six neutrons.
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The Atom Nitrogen Protons Neutrons Electrons Nitrogen has seven electrons, seven protons and seven neutrons.
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The Atom Oxygen Protons Neutrons Electrons Oxygen has eight electrons, eight protons and eight neutrons.
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The Atom Fluorine Protons Neutrons Electrons Fluorine has nine electrons, nine protons and ten neutrons.
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The Atom Neon Protons Neutrons Electrons Neon has ten electrons, ten protons and ten neutrons.
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The Atom Sodium Protons Neutrons Electrons Sodium has eleven electrons, eleven protons and twelve neutrons.
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How many protons, neutrons and electrons?
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Mendeleev Periodic table The periodic table arranges all the elements in groups  according to their properties. Horizontal rows are called PERIODS Vertical columns are  called GROUPS
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H He Li Be B C N O F Ne Na M g Al Si P S Cl Ar K Ca Fe Ni C u Zn Br Kr Ag I Xe Pt A u H g The Periodic Table Fact 1:  Elements in the same group have the same number of  electrons in the outer shell (this correspond to their group  number) E.g. all group 1 metals have  __ electron in their outer  shell These elements have __  electrons in their outer  shell These elements have __  electrons in their outer shells
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He Li Be B C N O F Ne Na M g Al Si P S Cl Ar K Ca Fe Ni C u Zn Br Kr Ag I Xe Pt A u H g The Periodic Table Fact 2:  As you move down through the periods an extra  electron shell is added: E.g. Lithium has 3 electron  in the configuration 2,1 Potassium has 19 electrons in the 
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This note was uploaded on 11/09/2011 for the course CHEM 210 taught by Professor Wilson during the Fall '10 term at BYU.

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