Periodic Table Groups

Definition - What does Periodic Table Groups mean?

Periodic Table Groups are columns of elements found in the modern periodic table. A group is also known as a family of atoms in which elements are arranged within each group of the periodic table. There are total 18 numbered groups in the modern periodic table, however, the “F” block columns between the group 2 and 3 are not numbered.

Petropedia explains Periodic Table Groups

The elements which fall under same groups in a modern periodic table have similar chemical and physical properties. The group numbering in a periodic table is based on the following three systems:

  • New IUPAC names (International Union of Pure and Applied Chemistry), which is the latest grouping system.
  • The old IUPAC system.
  • CAS system (Chemical Abstracts Service), which is the oldest grouping system.
New IUPAC namesOld IUPAC NameCAS Name of Element
Group 1IAIALithium Family
Group 2IIAIIABeryllium Family
Group 3IIIAIIIBScandium Family
Group 4IVAIVBTitanium Family
Group 5VAVBVanadium Family
Group 6VIAVIBChromium Family
Group 7VIIAVIIBManganese Family
Group 8VIIIVIIIBIron Family
Group 9VIIIVIIIBCobalt Family
Group 10VIIIVIIIBNickel Family
Group 11IBIBCopper Family
Group 12IIBIIBZinc Family
Group 13IIIBIIIABoron Family
Group 14IVBIVACarbon Family
Group 15VBVANitrogen Family
Group 16VIBVIAOxygen Family
Group 17VIIBVIIAFluorine Family
Group 18Group 0VIIIAHelium / Neon Family
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