The periodic table
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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

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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


Trends of periodic table

Trends of Periodic Table


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