The Periodic Table - PowerPoint 5 by W09xxzb

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									The Periodic Table
  Organization of the
      elements
          History of the Table
 Dmitri   Mendeleev
  – 1860s
  – Arranged elements by atomic mass


 Henry    Moseley
  – 1913
  – Arranged elements by atomic number
  – we use this table today!
               Periodic Law
 Propertiesof the elements are a
 periodic function of their atomic
 number.

 Elements in the same group have
 similar chemical and physical
 properties.
Color/Label your Periodic Table
 Number groups 1-18 on top
 Number periods 1-7 on side

 Label metals, nonmetals, metalloids

 Alkali metals – group 1

 Alkaline earth metals – group 2

 Transition elements – groups 3-12

 Halogens – group 17

 Noble gases – group 18

 Lanthanides – first row across bottom

 Actinides – second row across bottom

								
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