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scandium    
n. 金属元素之一,符号为Sc,原子序为21

金属元素之一,符号为Sc,原子序为21

scandium
n 1: a white trivalent metallic element; sometimes classified in
the rare earth group; occurs in the Scandinavian mineral
thortveitite [synonym: {scandium}, {Sc}, {atomic number 21}]

Scandium \Scan"di*um\, n. [NL. So called because found in
Scandinavian minerals.] (Chem.)
A rare metallic element of the boron group, whose existence
was predicted under the provisional name {ekaboron} by means
of the periodic law, and subsequently discovered by spectrum
analysis in certain rare Scandinavian minerals (euxenite and
gadolinite). It has not yet been isolated. Symbol Sc. Atomic
weight 44.
[1913 Webster]


Ekabor \Ek"a*bor`\ ([e^]k"[.a]*b[=o]r`), Ekaboron \Ek"a*bo"ron\
(-b[=o]"r[o^]n), n. [G., fr. Skr. [=e]ka one G. bor, boron,
E. boron.] (Chem.)
The name given by Mendelejeff in accordance with the periodic
law, and by prediction, to a hypothetical element then
unknown, but since discovered and named {scandium}; -- so
called because it was a missing analogue of the boron group.
See {Scandium}.
[1913 Webster]


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  • Scandium - Wikipedia
    Scandium is a soft metal with a silvery appearance It develops a slightly yellowish or pinkish cast when oxidized by air It is susceptible to weathering and dissolves slowly in most dilute acids
  • Scandium | Chemical Element, Properties, Uses | Britannica
    scandium (Sc), chemical element, a rare-earth metal of Group 3 of the periodic table Scandium is a silvery white, moderately soft metal It is fairly stable in air but will slowly change its colour from silvery white to a yellowish appearance because of formation of Sc 2 O 3 oxide on the surface
  • Scandium - Element information, properties and uses | Periodic Table
    Scandium is very widely distributed, and occurs in minute quantities in over 800 mineral species It is the main component of the very rare and collectable mineral thortveitite, found in Scandinavia
  • Where Is Scandium Found and How Is It Mined? - Biology Insights
    Scandium is broadly distributed throughout the Earth’s crust, found in minute quantities across more than 800 different mineral species Its crustal abundance ranges from 18 to 25 parts per million, comparable to elements like cobalt and even surpassing the abundance of lead
  • Is Scandium Toxic to Humans and the Environment?
    Scandium poses low risk to most people, but some compounds can be harmful Here’s what the research says about its effects on health and the environment
  • Scandium Facts, Symbol, Discovery, Properties, Uses
    It does not occur freely in nature, but associated with more than 800 minerals, commonly found in thortveitite, found in Scandinavia, from where it is extracted as a byproduct of uranium mill tailings
  • Scandium: Element Properties and Uses - samaterials. com
    Scandium (chemical symbol: Sc) is an uncommon and light metal that falls into the group of transition elements of the periodic table, which contains 21 elements by atomic number
  • Scandium | History, Uses, Facts, Physical Chemical Characteristics
    Scandium was discovered by Lars Fredik Nilson in 1879 It is a transition element and is widely used as aluminum-scandium alloy for minor aerospace industry The existence of scandium was predicted by Dmitri Mendeleev when he organized the elements in the periodic table
  • Scandium Statistics and Information | U. S. Geological Survey
    Scandium, a transition metal, is the lightest rare earth element (REE), but is classified neither as a light rare earth element (LREE) nor as a heavy rare earth element (HREE) Scandium is a soft, lightweight, silvery-white metal, similar in appearance and weight to aluminum
  • Scandium | Global - Rio Tinto
    Considered a critical mineral by countries including the United States, Canada, the European Union and Australia, scandium is a rare, versatile and useful metal





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