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Trends in the Periodic Table

Trends in the Periodic Table

Author: Charlie Paule

Review some uses for the periodic table of the elements.
Learn the definitions of Atomic Size, Ionization Energy.
Learn about trends in Atomic Size and Ionization Energy for elements in the periodic table.

The periodic table is useful for grouping elements into groups having similar physical
and chemical characteristics. Atomic size or atomic radius is the distance in a molecule
between the center of the atom and the edge of its electron cloud.
Atomic sizes for elements in a group in the periodic table increase as we go down the table.

Cover photo courtesy of the Chemical Heritage Foundation.

For an interactive periodic table see:
Dayah, M. (1997, October 1). Dynamic Periodic Table. Retrieved August 11, 2010, from Ptable:

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Review of the Periodic table and the Bohr Model of the Atom

Trends in Atomic Size and Ionization Energy in the Periodic Table

Video discusses trends in atomic size and ionization energy for elements in the
periodic table.

Review Questions and Answers on Periodic Table Trends

Slide show of questions and answers about atomic size and ionization
energy trends in the periodic table.