Periodic Table Groups
A group is a vertical column of elements in the periodic table of the chemical elements. Group is also known as a family. There are 18 groups in the standard periodic table. Elements in the same group have the same number of valence electron(s) in their outer shell. Hence, elements in a group share similar chemical properties.
| New IUPAC numbering | Old IUPAC (European) | CAS (American) | Name by element | Specific name | note |
|---|---|---|---|---|---|
| Group 1 | IA | IA | lithium family | alkali metals | Hydrogen is in this column, but not considered to be an alkali metal |
| Group 2 | IIA | IIA | beryllium family | alkaline earth metals | |
| Group 3 | IIIA | IIIB | scandium family | Consisting of rare earth elements plus actinides | |
| 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 | coinage metals | The name coinage metals is not IUPAC-recommended |
| Group 12 | IIB | IIB | zinc family | ||
| Group 13 | IIIB | IIIA | boron family | triels | triels from Greek tri (three, III) |
| Group 14 | IVB | IVA | carbon family | tetrels | tetrels from Greek tetra (four, IV) |
| Group 15 | VB | VA | nitrogen family | pnictogens | |
| Group 16 | VIB | VIA | oxygen family | chalcogens | |
| Group 17 | VIIB | VIIA | fluorine family | halogens | |
| Group 18 | Group 0 | VIIIA | helium family or neon family | noble gases |