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picture1_Pdf Printable Periodic Table 195918 | The Periodic Table 2017


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File: Pdf Printable Periodic Table 195918 | The Periodic Table 2017
the periodic table objective explain the use of chemical and physical properties in the historical development of the periodic table antoine lavoisier in the 1700 s complied a list of ...

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   THE PERIODIC TABLE
        Objective:  Explain the use of chemical and 
        physical properties in the historical 
        development of the Periodic Table.
        ■ Antoine Lavoisier:   In the 1700’s complied a list of all know elements (33) organized 
          into 4 categories.
           – Gases (light, heat, inflammable air, etc.)
           – Metals (antimony, silver, arsenic, bismuth, zinc, etc.)
           – Nonmetals (sulfur, phosphorus, pure charcoal, etc.)
           – Earths (chalk, clay, siliceous earth, etc.)
        ■ John Newlands:  In 1864 he noticed that when the elements were arrange in order 
          of increasing ATOMIC MASS that the properties REPEATED EVERY 8 ELEMENTS.  
           – This pattern is called PERIODIC.
           – Called this the Law of Octaves.
           – Not accepted because did not work for all elements and “octave” sounded 
             “unscientific.”
       Dmitri Mendeleev:  1869
       Father of The Periodic Table
                           ■ Also noticed that when the elements were arranged 
                             by atomic mass that there was a Periodic Pattern in 
                             their properties.
                           ■ His table had vertical rows and horizontal columns.
                           ■ The Columns had SIMILAR PROPERTIES.
                           ■ Left BLANK SPACES for undiscovered elements.
                           ■ Predicted the properties for:
                             – scandium
                             – gallium
                             – germanium
                           ■ LotharMeyers demonstrated the same connection 
                             but Mendeleev was FIRST.
            Henry Moseley (1887 – 1915)
                                                               ■ MODERN PERIODIC TABLE
        ■ Problems with Mendeleev’s table:
            – As new elements were discovered did not fit      ■ Vertical Columns:
                                                                   –  Groups or Families
               pattern.                                            –  18 groups
        ■ Henry Moseley discovered that each element had a  ■ Horizontal Rows:
           UNIQUE NUMBER OF PROTONS.                               –  Periods
                                                                   –  7 periods
        ■ This is the ATOMIC NUMBER.                           ■ Representative Elements:
                                                                   –  groups 1, 2, 13-18
        ■ In 1913 he proposed that the Period Table be         ■ Transition Elements:
           organized by Atomic Number which gave a CLEAR           –  groups 3-12
           Period Pattern.                                         –  Inner Transition Metals
        ■ PERIODIC LAW:  There is a periodic repetition of     ■ Also classified as:
                                                                   –  metals
           chemical and physical properties of the elements        –  nonmetals
           when they arranged by increasing ATOMIC NUMBER.         –  metalloids
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...The periodic table objective explain use of chemical and physical properties in historical development antoine lavoisier s complied a list all know elements organized into categories gases light heat inflammable air etc metals antimony silver arsenic bismuth zinc nonmetals sulfur phosphorus pure charcoal earths chalk clay siliceous earth john newlands he noticed that when were arrange order increasing atomic mass repeated every this pattern is called law octaves not accepted because did work for octave sounded unscientific dmitri mendeleev father also arranged by there was their his had vertical rows horizontal columns similar left blank spaces undiscovered predicted scandium gallium germanium lotharmeyers demonstrated same connection but first henry moseley modern problems with as new discovered fit groups or families each element unique number protons periods representative proposed period be transition which gave clear inner repetition classified they metalloids...

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