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The Periodic Table Review . Who is Mendeleev? How did Mendeleev organize the periodic table?. A. Dmitri Mendeleev. Dmitri Mendeleev (1869, Russian). Organized elements by increasing atomic mass . Predicted the existence of undiscovered elements. The Periodic Table . Who is Mosely?

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The Periodic Table Review

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The Periodic TableReview

Who is Mendeleev?

How did Mendeleev organize the periodic table?


A. Dmitri Mendeleev

  • Dmitri Mendeleev (1869, Russian)

  • Organized elements by increasing atomic mass.

  • Predicted the existence of undiscovered elements.


The Periodic Table

Who is Mosely?

How did Mosely organize the periodic table?


B. Henry Mosely

  • Henry Mosely (1913, British)

  • Organized elements by increasing

  • Fixed problems in Mendeleev’s arrangement.

atomic number


The Periodic Table

Review


The Periodic Table

On the periodic table where are the metals located?


A. Metallic Character

Metals found on the left

  • Metals

  • Nonmetals

  • Metalloids


The Periodic Table

Where are the non-metals?


A. Metallic Character

Nonmetals are on the right

  • Metals

  • Nonmetals

  • Metalloids


The Periodic Table

Where are the metalloids ?


Metalloids are between the metals and nonmetals

A. Metallic Character

  • Metals

  • Nonmetals

  • Metalloids


A. Metallic Character

  • Metals

  • Nonmetals

  • Metalloids


The Periodic Table

Where are the representative elements ?


B. Table Sections

  • Representative Elements

  • Transition Metals

  • Inner Transition Metals


The Periodic Table

Where are the transition metals?


B. Table Sections

  • Representative Elements

  • Transition Metals

  • Inner Transition Metals


B. Table Sections

  • Representative Elements

  • Transition Metals

  • Inner Transition Metals


Columns & Rows

  • Group (Family)

  • Period


The Periodic Table

Periodic Trends


A. Terms

  • Periodic Law

  • Properties of elements repeat periodically when the elements are arranged by increasing atomic number.


A. Terms

  • Valence Electrons

    • e- in the outermost energy level


1A

8A

2A

3A 4A 5A 6A 7A

B. Periodic Trends

  • Group # = # of valence e- (except He)

    • Families have similar reactivity.

  • Period # = # of energy levels


C. Dot Diagrams

  • Dots represent the valence e-.

  • EX: Sodium

  • EX: Chlorine


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