What are Rare Earth Metals? Define Rare Earth Metals
Rare Earth Metals are used as a term in Periodic Chemistry when classifying the chemical elements. Each element can usually be classified as a metal or a non-metal based on their general Chemical and Physical Properties. The rare earths share many common properties. This makes them difficult to separate or even distinguish from each other. Rare Earth Metals are any of the metallic elements within Group 3 in the Periodic Table (see the List of Rare Earth metals). Rare Earth metals are a set of 17 chemical elements in the periodic table, specifically the fifteen lanthanoids plus scandium and yttrium. All lanthanoids are relatively soft and reactive metals.
What are Rare Earth Metals? Common Properties of Rare Earth Metals
The rare earths metals are silver, silvery-white or gray metals which have a high luster, but tarnish readily in air.