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The Periodic Table of Elements
Dmitri Mendeleev generally is credited with the creation of the first periodic table, which charts the chemical elements by atomic number and valence shell electron configuration.
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Group (periodic table) - Wikipedia

en.wikipedia.org/wiki/Group_(periodic_table)

In chemistry, a group is a column of elements in the periodic table of the chemical elements. .... IIIA, boron family, triels, icosagens, triels from Greek tri (three, III).

The Periodic Table: Families and Periods - dummies

www.dummies.com/education/science/chemistry/the-periodic-table-families-and-periods/

In the periodic table of elements, there are seven horizontal rows of elements called periods. The vertical columns of elements are called groups, or families.

Chem4Kids.com: Elements & Periodic Table: Families

www.chem4kids.com/files/elem_families.html

Chem4Kids.com! This tutorial introduces families of the periodic table. Other sections include matter, elements, reactions, and biochemistry.

Element Families and Descriptions of Each - Chemistry - About.com

chemistry.about.com/od/elementgroups/ss/Element-Families.htm

Elements may be categorized according to element families. This is an ... Columns of the periodic table typically mark groups or families. Three systems have ...

Periodic Table - Model Science Software

www.modelscience.com/PeriodicTable.html

The Periodic table can also be divided into several families of elements each having similar properties. For our purposes we will define the following ten families:.

High School Chemistry/Families on the Periodic Table - Wikibooks ...

en.wikibooks.org/wiki/High_School_Chemistry/Families_on_the_Periodic_Table

Take a look now at the first group or column in the Periodic Table. It is the one marked "1A" in the Period Table figure above. The groups or families are the ...

Groups, Families, Periods and Valence of the Periodic Table

spcpchemroom9.blogspot.com/2010/10/groups-families-periods-and-valence-of.html

Oct 3, 2010 ... A group is a vertical column in the Periodic Table of Elements. They are considered the most important method in classifying the different ...

Families - Elements Table

elements-table.com/family/

Families of the Periodic Table of Elements. Each of the elements in the Periodic Table can be divided into one of nine groups. These groups share many similar ...

Interactives . The Periodic Table . Groups - Annenberg Learner

www.learner.org/interactives/periodic/groups.html

Interactives -- The Periodic Table, Pick Another Interactive ... Just as most groups or families tend have some specific characteristics or traits in common (like ...