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I. History (p. 155-168)

Ch. 6 - The Periodic Table. I. History (p. 155-168). A. Mendeleev. Dmitri Mendeleev (1869, Russian) Organized elements by increasing atomic mass . Elements with similar properties were grouped together. There were some discrepancies. A. Mendeleev. Dmitri Mendeleev (1869, Russian)

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I. History (p. 155-168)

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  1. Ch. 6 - The Periodic Table I. History(p. 155-168)

  2. A. Mendeleev • Dmitri Mendeleev (1869, Russian) • Organized elements by increasing atomic mass. • Elements with similar properties were grouped together. • There were some discrepancies.

  3. A. Mendeleev • Dmitri Mendeleev (1869, Russian) • Predicted properties of undiscovered elements.

  4. B. Moseley • Henry Mosely (1913, British) • Organized elements by increasing atomic number. • Resolved discrepancies in Mendeleev’s arrangement.

  5. Ch. 6 - The Periodic Table II. Organization of theElements into Patterns

  6. A. Metallic Character • Metals • Nonmetals • Metalloids

  7. B. Blocks • Main Group Elements • Transition Metals • Inner Transition Metals

  8. B. Periodic Table Basics • Periods (rows) tell you the Energy Level of the electrons, inner energy levels like 1 &2 are lower in energy than the outer shells like 7 & 8 • Groups or Families (the columns) have similar valence e- within a group resulting in similar chemical properties

  9. B. Chemical Reactivity • Alkali Metals • Alkaline Earth Metals • Transition Metals • Halogens • Noble Gases

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