Chemistry
Advertisement

The Lanthanoids are a group of 16 members of the periodic table, and are usually shown away from the main table. Occasionally, on a periodic table, Lanthanum or Lutetium is shown as part of the main table. The group tends to consist of silvery white metals, with one radioactive element, the element Promethium. A trend is that the heavier the lanthanide is, the less reactive it becomes. With lanthanum being a highly reactive metal with air, and lutetium being far less reactive with air.

Advertisement