Ch. 10 - The Periodic Table

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Ch. 10 - The Periodic Table

• I. History of the Periodic Table
• (p.284-285)
• Mendeleev
• Mosely

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A. Dmitri Mendeleev

• Dmitri Mendeleev (1869, Russian)

• Organized elements by increasing atomic mass.
• Predicted the existence of undiscovered elements.

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B. Henry Mosely

• Henry Mosely (1913, British)

• Organized elements by increasing atomic number.
• Fixed problems in Mendeleevs arrangement.

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Ch. 10 - The Periodic Table

• II. Organization (p.286-291)
• Metallic Character
• Rows Columns
• Table Sections

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A. Metallic Character

• Metals
• Nonmetals
• Metalloids

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B. Table Sections

• Representative Elements
• Transition Metals
• Inner Transition Metals

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B. Table Sections
Overall Configuration
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C. Columns Rows

• Group (Family)
• Period

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Ch. 10 - The Periodic Table

• III. Periodic Trends (p.288-291)
• Terms
• Periodic Trends
• Dot Diagrams

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A. Terms

• Periodic Law

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

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A. Terms

• Valence Electrons
• e- in the outermost energy level
• Atomic Radius

• First Ionization Energy
• energy required to remove an e- from a neutral
  atom

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B. Periodic Trends

• Atomic Radius

• Increases to the LEFT and DOWN.

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B. Periodic Trends

• First Ionization Energy

• Increases to the RIGHT and UP.

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B. Periodic Trends

• Which atom has the larger radius?

• Be or Ba
• Ca or Br

Ba Ca
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B. Periodic Trends

• Which atom has the higher 1st I.E.?

• N or Bi
• Ba or Ne

N Ne
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B. Periodic Trends

• Group of valence e- (except He)
• Families have similar reactivity.
• Period of energy levels

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C. Dot Diagrams

• Dots represent the valence e-.
• EX Sodium

• EX Chlorine