Mr. Skirbst Physical Science Topic 14

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Presentation transcript:

Mr. Skirbst Physical Science Topic 14 Periodic Table Mr. Skirbst Physical Science Topic 14

Periodic Table - An arrangement of elements based on a repeating pattern

Periodic Table Dmitri Mendeleev (Russian Chemist)

Periodic Table Dmitri Mendeleev (Russian Chemist) - In mid 1800’s, first to arrange elements into a periodic table

Periodic Table Dmitri Mendeleev’s Table According to increasing atomic mass

Periodic Table Dmitri Mendeleev’s Table According to increasing atomic mass Predicted element #32 “ekasilicon” (later discovered as Germanium)

Periodic Table Henry Mosley (British Scientist)

Periodic Table Henry Mosley (British Scientist) - In early 1900’s developed the Periodic Law (elements are arranged by atomic number = # of protons)

Periodic Table Element Square:

Periodic Table Columns: Called “groups” or “families” Elements have similar characteristics or properties

Periodic Table Rows: Called “periods” Elements’ valence # increases from left to right (valence = # “outer” electrons)

Periodic Table groups

Periodic Table http://www.rsc.org/education/teachers/learnnet/ptdata/table/index.htm