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Tour of the Periodic Table
(Chapter 6)
Dr. Walker
Objectives
• Describe the historical development of the
periodic table
• Name the groups of the periodic table and
describe their properties
• List elements that are diatomic
• Differentiate elements based on periodic
trends
History
• First periodic table created by Dmitri
Mendeleev
–Arranged elements by increasing atomic mass,
which caused mistakes
–Was incomplete, but pattern predicted existence
of elements found later
• Current periodic table created by Henry
Moseley
–Arranged by increasing atomic number
Mendeleev’s Periodic Table
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