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Periodic Table
Mr. SkirbstPhysical 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 TableHenry Mosley (British Scientist)
Periodic TableHenry Mosley (British Scientist)- In early 1900’s developed the
Periodic Law (elements are arranged by atomic number = # of protons)
Periodic TableElement Square:
Periodic TableColumns:- Called “groups” or “families”- Elements have similar
characteristics or properties
Periodic TableRows:- Called “periods”- Elements’ valence # increases
from left to right- (valence = # “outer” electrons)
Periodic Tablegroups
Periodic Tablehttp://www.rsc.org/education/teachers/learnnet/ptdata/table/index.htm