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Bangladesh Chemical Industries Corporation (BCIC), the largest corporation in industrial sector in the country was established in 1976 vide second amendment of P.0.27 upon merger of Bangladesh Paper and Board Corporation, Bangladesh Fetter, Chemical and Pharmaceutical Corporation and Bangladesh Tanneries Corporation.
Scandium is a chemical element with the symbol Sc and atomic number 21. It is a silvery-white metallic d-block element. Historically, it has been classified as a rare-earth element, [9] together with yttrium and the lanthanides. It was discovered in 1879 by spectral analysis of the minerals euxenite and gadolinite from Scandinavia. [10]
The group is also called the scandium group or scandium family after its lightest member. The chemistry of the group 3 elements is typical for early transition metals: they all essentially have only the group oxidation state of +3 as a major one, and like the preceding main-group metals are quite electropositive and have a less rich ...
He discovered the element scandium in 1879, by separating out scandium(III) oxide, also known as scandia. [1]: 550 [2] In addition to his work concerning the analytic chemistry of elements and rare earths, he made substantial contributions to Swedish agriculture, including methods of fertilization and the introduction of sugar beets as a crop.
The reaction of scandium trichloride with two equivalents of sodium cyclopentadienide (NaCp) produces the chloride-bridged dimer: 2 ScCl 3 + 4 NaCp → [Cp 2 Sc(μ-Cl)] 2 + 4 NaCl. Cp 3 Sc is a polymer wherein one third of the Cp ligands serving as bridging ligands. [5] Bulkier cyclopentadienide ligands give monoscandium derivatives, e.g. (C 5 ...
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The establishment of GPFPLC was approved by the government in 2018. The factory was scheduled to go to the production in June, 2022. But it was delayed for financial and mechanical causes. [2] [3] Mitsubishi Heavy Industries Limited (MHI) and China National Chemical Engineering No 7 Construction Co Ltd (CC-7) worked together to construct the ...
Naturally occurring scandium (21 Sc) is composed of one stable isotope, 45 Sc. Twenty-seven radioisotopes have been characterized, with the most stable being 46 Sc with a half-life of 83.8 days, 47 Sc with a half-life of 3.35 days, and 48 Sc with a half-life of 43.7 hours and 44 Sc with a half-life of 3.97 hours.