scandium$72401$ - ορισμός. Τι είναι το scandium$72401$
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Τι (ποιος) είναι scandium$72401$ - ορισμός

Scandium-36; Scandium-37; Scandium-38; Scandium-39; Scandium-40; Scandium-41; Scandium-42; Scandium-43; Scandium-45; Scandium-46; Scandium-47; Scandium-48; Scandium-49; Scandium-50; Scandium-51; Scandium-52; Scandium-53; Scandium-54; Scandium-55; Scandium-56; Scandium-57; Scandium-58; Scandium-59; Scandium-60; Scandium-42m; Scandium-43m1; Scandium-43m2; Scandium-44m1; Scandium-44m2; Scandium-44m3; Scandium-45m; Scandium-46m1; Scandium-46m2; Scandium-47m; Scandium-50m; Scandium-54m; Scandium isotopes; Scandium isotope

Isotopes of scandium         
Naturally occurring scandium (21Sc) is composed of one stable isotope, 45Sc. Twenty-five radioisotopes have been characterized, with the most stable being 46Sc with a half-life of 83.
scandium         
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CHEMICAL ELEMENT WITH SYMBOL SC AND ATOMIC NUMBER 21
Element 21; Aluminium-scandium alloy; Sc element; Sc (element); Skandium; History of scandium
['skand??m]
¦ noun the chemical element of atomic number 21, a soft silvery-white metal resembling the rare-earth elements. (Symbol: Sc)
Origin
C19: mod. L., from Scandia, contr. of Scandinavia (where minerals are found containing this element).
Scandium         
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CHEMICAL ELEMENT WITH SYMBOL SC AND ATOMIC NUMBER 21
Element 21; Aluminium-scandium alloy; Sc element; Sc (element); Skandium; History of scandium
·noun 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.

Βικιπαίδεια

Isotopes of scandium

Naturally occurring scandium (21Sc) is composed of one stable isotope, 45Sc. Twenty-five radioisotopes have been characterized, with the most stable being 46Sc with a half-life of 83.8 days, 47Sc with a half-life of 3.35 days, and 48Sc with a half-life of 43.7 hours and 44Sc with a half-life of 3.97 hours. All the remaining isotopes have half-lives that are less than four hours, and the majority of these have half-lives that are less than two minutes, the least stable being proton unbound 39Sc with a half-life shorter than 300 nanoseconds. This element also has 13 meta states with the most stable being 44m2Sc (t1/2 58.6 h).

The isotopes of scandium range in atomic weight from 38 u (36Sc) to 62 u (62Sc). The primary decay mode at masses lower than the only stable isotope, 45Sc, is beta-plus or electron capture, and the primary mode at masses above it is beta-minus. The primary decay products at atomic weights below 45Sc are calcium isotopes and the primary products from higher atomic weights are titanium isotopes.