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 âFâ 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 names | Old IUPAC Name | CAS | Name of Element |
Group 1 | IA | IA | Lithium Family |
Group 2 | IIA | IIA | Beryllium Family |
Group 3 | IIIA | IIIB | Scandium Family |
Group 4 | IVA | IVB | Titanium Family |
Group 5 | VA | VB | Vanadium Family |
Group 6 | VIA | VIB | Chromium Family |
Group 7 | VIIA | VIIB | Manganese Family |
Group 8 | VIII | VIIIB | Iron Family |
Group 9 | VIII | VIIIB | Cobalt Family |
Group 10 | VIII | VIIIB | Nickel Family |
Group 11 | IB | IB | Copper Family |
Group 12 | IIB | IIB | Zinc Family |
Group 13 | IIIB | IIIA | Boron Family |
Group 14 | IVB | IVA | Carbon Family |
Group 15 | VB | VA | Nitrogen Family |
Group 16 | VIB | VIA | Oxygen Family |
Group 17 | VIIB | VIIA | Fluorine Family |
Group 18 | Group 0 | VIIIA | Helium / Neon Family |