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The Periodic Table. Antonio & Kevin . History. Created by Dmitri Mendeleev 1869 Intent of table to illustrate trends of the elements At point of conception had a total of 63 elements. Metals. The metal Classification is largest on Periodic table Shown in green 88 elements in total

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the periodic table

The Periodic Table

Antonio & Kevin

history
History
  • Created by Dmitri Mendeleev
  • 1869
  • Intent of table to illustrate trends of the elements
  • At point of conception had a total of 63 elements
metals
Metals
  • The metal Classification is largest on Periodic table
  • Shown in green
  • 88 elements in total
  • Classifications:
    • Luster
    • Good conductors of heat and electricity
    • High density
    • High melting point
    • Ductile
    • Malleable
nonmetals
Nonmetals
  • 17 elements
  • Mostly on right side of PT, except for Hydrogen
  • Shown in Orange
  • Classifications:
    • No luster
    • Poor conductor of heat and electricity
    • Brittle
    • Not ductile
    • Not malleable
    • Low density
    • Low melting point
metalloids
Metalloids
  • Shown on “Stair-Case”
  • Shown in Purple
  • Classifications:
    • Solids
    • Can be shiny or dull
    • Ductile
    • Malleable
    • Conduct heat and electricity
period
Period
  • Start from 1-7 going down horizontal
  • Each element in same period have same amount of electron shells
electronegativity
Electronegativity
  • Definition: Ability of an atom to attract electrons when the atom is in the compound
  • Elements get more electronegative when heading toward F(Fluorine)
  • Electronegativity values decrease from top to bottom within a group, for representative elements the values tend to increase from left to right across a period
trends of ionization
Trends of Ionization
  • Definition: First ionization energy tends to decreases from top to bottom within a group and increase from left to right across a period
  • Cations are always smaller than the atoms they formed from, anions are always larger then the atoms they formed from
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