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Periodic trends 6.1 & 6.2

Periodic trends 6.1 & 6.2. History. Newlands - 1864 organized by atomic mass Law of Octaves Mendeleev - 1869 Organized by atomic mass with similar properties down columns Predicted properties of UN-discovered elements. History. Mosely – 1913

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Periodic trends 6.1 & 6.2

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  1. Periodic trends 6.1 & 6.2

  2. History • Newlands - 1864 • organized by atomic mass • Law of Octaves • Mendeleev - 1869 • Organized by atomic mass with similar properties down columns • Predicted properties of UN-discovered elements

  3. History • Mosely – 1913 • Many elements in Mendeleev’s table shown to be out of place • Rearranged by number of protons rather than atomic mass

  4. Periodic Law The repetition of chemical and physical properties as a result of organizing elements by increasing atomic number

  5. Modern Periodic Table

  6. Metals, Non-Metals, Metalloids

  7. Alkali Metals

  8. Alkali Earth Metals (Rare Earth)

  9. Transition Metals

  10. Inner Transition Metals

  11. Halogens

  12. Noble Gases

  13. Valence Electrons

  14. Arsenic

  15. Arsenic [Ar] 4s2 3d10 4p3

  16. Arsenic [Ar] 4s2 3d104p3

  17. Arsenic [Ar] 4s2 3d10 4p3 Group number Valence electrons 5A 5 15 5

  18. Arsenic [Ar] 4s2 3d10 4p3 Group number Valence electrons 5A 5 15 5 (15-10)

  19. D Block

  20. S Block

  21. P Block

  22. F block

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