definition bdellium
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Bdellium Bdellium resin. Bdellium /ˈdɛliəm/ (Hebrew bedolach), also bdellion, is a semi-transparent oleo-gum resin extracted from Commiphora wightii and from Commiphora africana trees growing in Ethiopia, Eritrea and sub-saharan Africa. 1 Composition.
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Rubidium - Rb Rubidium is a soft, silvery-white metallic element of the alkali metals group (Group 1). It is one of the most electropositive and alkaline elements. Rubidium can be liquid at ambient temperature, but only on a hot day given that its melting point is about 40°C.
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Barium Barium is a chemical element with symbol Ba and atomic number 56. It is the fifth element in Group 2, a soft silvery metallic alkaline earth metal.Because of its high chemical reactivity barium is never found in nature as a free element.he most common naturally occurring minerals of barium are barite (barium sulfate, BaSO 4) and witherite (barium carbonate, BaCO 3), both being insoluble in water. Barium's name originates from the alchemical derivative baryta, which itself comes from Greek βαρύς (barys), meaning heavy..
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Trapezium Trapezium is a quadrilateral with one pair of parallel sides. The parallel sides of a trapezium are called bases. The perpendicular line between two parallel lines is the altitude of the regular trapezium.
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Rhodium Rhodium is a chemical element with symbol Rh and atomic number 45. It is a rare, silvery-white, hard, and chemically inert transition metal.It is a member of the platinum group.he industrial extraction of rhodium is complex, as the metal occurs in ores mixed with other metals such as palladium, silver, platinum, and gold. It is found in platinum ores and extracted as a white inert metal which is very difficult to fuse.
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Rubidium Rubidium is a chemical element with symbol Rb and atomic number 37. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, such as very rapid oxidation in air.ubidium has also been reported to ignite spontaneously in air. Rubidium has a very low ionization energy of only 406 kJ/mol. Rubidium and potassium show a very similar purple color in the flame test, which makes spectroscopy methods necessary to distinguish the two elements.
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THE LIST OF Pro Discount Programs for Makeup Artists Includes Sources for Containers, Disposals, Tins etc. Bdellium Tools Pro is a free membership program designed to support makeup artists, industry professionals and makeup students. Bdellium Tools Pro offers a 40% discount for makeup artists & 20% discount for industry professionals and makeup students.
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Niobium Niobium: Niobium (Nb), chemical element, refractory metal of Group 5 (Vb) of the periodic table, used in alloys, tools and dies, and superconductive magnets. Niobium is closely associated with tantalum in ores and in properties. Due to the great chemical similarity of niobium and tantalum, the establishment
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praseodymium A soft, silvery, malleable, ductile rare-earth element that develops a characteristic green tarnish in air. It occurs naturally with other rare earths in monazite and bastnaesite and is used to color glass and ceramics yellow, as a core material for carbon arcs, and in metallic alloys. Atomic number 59; atomic weight 140.908; melting point 931°C; boiling point 3,520°C; specific gravity 6.773; valence 3, 4.
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BE-RYL-LI-UM Beryllium (Be) is the fourth element of the periodic table and was discovered and named in 1798 by a chemist named Vaquelin. He actually found the element when he was working with emeralds.Now we use beryllium in nuclear reactors, machine parts, and satellites.eryllium (Be) is the fourth element of the periodic table and was discovered and named in 1798 by a chemist named Vaquelin. He actually found the element when he was working with emeralds.
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Beryllium | references | in Wikidata. Beryllium is a chemical element with symbol Be and atomic number 4. It is a relatively rare element in the universe, usually occurring as a product of the spallation of larger atomic nuclei that have collided with cosmic rays. Within the cores of stars beryllium is depleted as it is fused and creates larger elements. It is a divalent element which occurs naturally only in combination with other elements in minerals. Notable gemstones which contain beryllium include beryl and chrysoberyl. As a fr
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Germanium Germanium is a chemical element with symbol Ge and atomic number 32. It is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. Pure germanium is a semiconductor with an appearance similar to elemental silicon. Like silicon, germanium naturally reacts and forms complexes with oxygen in nature. Unlike silicon, it is too reactive to be found naturally on Earth in the free (elemental) state.
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scandium Definition of SCANDIUM. : a silvery-white metallic element found widely especially in association with rare earth elements and used especially in alloys and in high-intensity electric lamps — see element table. See scandium defined for kids. ADVERTISEMENT. a silvery-white metallic element found widely especially in association with rare earth elements and used especially in alloys and in high-intensity electric lamps — see element table. See scandium defined for kids.
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- Thorium (Th) is a radioactive metallic element that, until the 1950’s, was known only by chemists and physicists. It is not abundant, but major supplies are in sands rich in monazite ((Ce,La, Nd,Th)PO4). Commercially, monazite is recovered as a by-product of the processing of titanium-bearing heavy-mineral sands.
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radon A colorless, odorless, radioactive element in the noble gas group. It is produced by the radioactive decay of radium and occurs in minute amounts in soil, rocks, and the air near the ground. Radon is used as a source of radiation for the treatment of cancer and other diseases.
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- Tutor salary is full-time annual starting salary. Intern, contractor and hourly pay scale vary from regular exempt employee. Compensation depends on work experience, job location, bonus, benefits and other factors.
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Darmstadtium - Ds Darmstadtium. Darmstadtium is a synthetic element in the periodic table which quickly decays: its isotopes of mass 279-281 have half-lives measured in microseconds. It is named after the place of its discovery, Darmstadt. Applications.
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Who Discovered Niobium 21 Jun, 2012 Who discovered 0. Niobium is a soft gray metal and a chemical element represented by the symbol Nb with the atomic number 41. The free metal does not occur in nature, but it can be found in certain minerals such as columbite and pyrochlore. The largest deposits of niobium containing minerals are found in Brazil and Canada and these two countries continue to produce the majority of the element for the world. Niobium is chemically similar to the element tantalum, which meant that its discovery was the subject of much debate.
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syncytium syncytium. [sinsit′ē·əm] pl. syncytia. Etymology: Gk, syn + kytos, cell. a group of cells in which the cytoplasm of one cell is continuous with that of adjoining cells, resulting in a multinucleate unit. syncytial, adj.yncytium. [sinsit′ē·əm] pl. syncytia. Etymology: Gk, syn + kytos, cell. a group of cells in which the cytoplasm of one cell is continuous with that of adjoining cells, resulting in a multinucleate unit. syncytial, adj.
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tin 1 a metallic element, occurring in cassiterite, that has several allotropes; the ordinary malleable silvery-white metal slowly changes below 13.2°C to a grey powder. 2  It is used extensively in alloys, esp bronze and pewter, and as a noncorroding coating for steel.
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Radium Radium is a chemical element with symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals. Pure radium is silvery-white, but it readily reacts with nitrogen on exposure to air, forming a black surface layer of radium nitride. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226, which has a half-life of 1600 years and decays into radon gas. When radium decays, ionizing radiation is a
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Nb â Niobium Nb – Niobium. Niobium, is a chemical element with the symbol Nb and atomic number 41. It is a soft, grey, ductile transition metal, which is often found in the pyrochlore mineral, the main commercial source for niobium, and columbite. The name comes from Greek mythology: Niobe, daughter of Tantalus.
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- Dubnium is a chemical element with symbol Db and atomic number 105. It is named after the town of Dubna in Russia (north of Moscow), where it was first produced.t is a member of the 7th period and belongs to Group 5. Chemistry experiments have confirmed that dubnium behaves as the heavier homologue to tantalum in group 5. The chemical properties of dubnium are characterized only partly. They are similar to those of other group 5 elements.
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Aeschynite- (Y) Aeschynite-(Y) (or Aeschinite-(Y), Aeschynite-(Yt), Blomstrandine, Priorite) is a rare earth mineral of yttrium, calcium, iron, thorium, titanium, niobium, oxygen, and hydrogen with formula: (Y,Ca,Fe,Th)(Ti,Nb)2(O,OH)6. Its name comes from the Greek word for shame. Its Mohs scale rating is 5 to 6.
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Germanium: the essentials Germanium: the essentials. Germanium is a gray-white semi-metal, and in its pure state is crystalline and brittle, retaining its lustre in air at room temperature. It is a very important semiconductor material. Zone-refining techniques have led to production of crystalline germanium for semiconductor use with an impurity of only one part in 10 -10.
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Niobium | references | in Wikidata. Niobium, formerly columbium, is a chemical element with symbol Nb (formerly Cb) and atomic number 41. It is a soft, grey, ductile transition metal, which is often found in the pyrochlore mineral, the main commercial source for niobium, and columbite. Its name comes from Greek mythology, specifically Niobe, who was the daughter of Tantalus, the namesake of tantalum.