Team C: Henry Mosley 1911

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Team C Henry Mosley 1911

• Jaclyn Sinclair
• Kayla Yarger

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What did Henry Mosley discover?

• He found a new way to sort the periodic table.
• He discovered that atomic numbers were not
  arbitrary, but have a physical basis.
• He used atomic numbers to sort the periodic table.

Henry Mosley
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How did his discovery alterMendeleevs table?

• Mendeleevs periodic table was arranged in order
  of increasing atomic mass.
• Henry Mosley altered his table by arranging them
  by increasing atomic number.

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Mendeleevs Periodic Table
Mendeleevs table had 8 groups and 6 periods.
The elements were arranged by atomic mass.
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Mosleys Periodic Table
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Modern Periodic Law

• Physical and chemical properties of elements
  often occur in a systematic manner according to
  their atomic number.
• The periodic table is arranged by atomic number.
  It goes from the smallest atomic number to the
  largest.

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The 1900s What We Found Visiting Henry

• Lawrence Hargrave makes the first stable wing
  design for a heavier-than-air aircraft
• Mass production of the automobile
• Wide popularity of home phonograph
• Panama Canal is built by the United States
• The Photostat machine begins modern era of
  document imaging
• Wright Brothers fly at Kitty Hawk, NC.

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Discussion Question

• How do you think history would have been changed
  if Henry Mosley hadnt found a new way to arrange
  the periodic table?