trace rare metal
1Rare earth element — Rare earth ore, shown with a United States penny for size comparison These rare …
2MÉTAL (ARTS DU) — Les arts du métal regroupent un certain nombre de domaines et d’activités artistiques dont les principaux sont l’orfèvrerie, la poterie d’étain, la ferronnerie, la dinanderie, les bronzes d’art et d’ameublement, l’armurerie et la bijouterie. Dans …
3rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 …
4Rare Earth hypothesis — In planetary astronomy and astrobiology, the Rare Earth hypothesis argues that the emergence of complex multicellular life (metazoa) on Earth required an improbable combination of astrophysical and geological events and circumstances. The term… …
5Metal carbonyl — Iron pentacarbonyl An iron atom with five CO ligands Metal carbonyls are coordination complexes of transition metals with carbon monoxide ligands. These complexes may be homoleptic, that is containing only CO ligands, such as nickel carbonyl… …
6metal — metallike, adj. /met l/, n., v., metaled, metaling or (esp. Brit.) metalled, metalling. n. 1. any of a class of elementary substances, as gold, silver, or copper, all of which are crystalline when solid and many of which are characterized by… …
7metal — noun ADJECTIVE ▪ soft ▪ pure ▪ ferrous, non ferrous ▪ base, heavy, noble, precious …
8Alkali metal — Group → 1 ↓ Period 2 3 Li 3 …
9Crystal structure of boron-rich metal borides (data page) — Contents 1 Table I 2 Table II 3 Table III 4 Table IVa …
10Superior craton — in the west. The western margin extends from northern Minnesota through eastern Manitoba to northwestern Ontario.The formation of the Superior craton is best explained within the context of 2.72 2.68 Ga accretion of small continental plates and… …
