Organization of the elements

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Presentation transcript:

Organization of the elements The Periodic Table Organization of the elements

History of the Table Dmitri Mendeleev Henry Moseley 1860s Arranged elements by atomic mass Henry Moseley 1913 Arranged elements by atomic number we use this table today!

Periodic Law Properties of 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