Chapter 3 Notes: The Periodic Table

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Presentation transcript:

Chapter 3 Notes: The Periodic Table Chapter 3.1: The arrangement of elements in the Periodic Table helps to predict their electron configuration. Chapter 3 Notes: The Periodic Table

Periodic Table History Many scientists worked on how to organize the elements, but Demetri Mendeleyev is credited with making the breakthrough arrangement. Left gaps to fill in elements that have not been discovered yet. Had no knowledge of the structure of the atom Working with properties of elements

Periods and Groups Si Ge As Sb Te Po Periods = across (rows) Groups = down (columns) Valence electrons related to group number and blocks (s, p, d, f) Non-metals = right side of “stairs” Reactive ex: Halogens Unreactive ex: Noble gases Metals = left side of “stairs” Reactive ex: Alkali metals Metalloids = up and down of “stairs” Si Ge As Sb Te Po