mendelevium वाक्य
उदाहरण वाक्य
मोबाइल
- The initial steps are the same as above, and employs HDEHP for extraction chromatography, but coprecipitates the mendelevium with terbium fluoride instead of lanthanum fluoride.
- In 1955, mendelevium was synthesized by irradiating a target consisting of about 10 9 atoms of 253 Es in the 60-inch cyclotron at Berkeley Laboratory.
- The chemistry of mendelevium is typical for the late actinides, with a preponderance of the + 3 oxidation state but also an accessible + 2 oxidation state.
- Some of these elements, like carbon and iron, will be familiar to you, and others, like ytterbium and mendelevium, are probably new to you.
- In 1955, element 101 was discovered and named mendelevium in honor of D . I . Mendeleev, the first to arrange the elements in a periodic manner.
- However, later experiments found no evidence for mendelevium ( I ) and found that mendelevium behaved like divalent elements when reduced, not like the monovalent alkali metals.
- However, later experiments found no evidence for mendelevium ( I ) and found that mendelevium behaved like divalent elements when reduced, not like the monovalent alkali metals.
- Then, 50 mg of chromium is added to the mendelevium to reduce it to the + 2 state in 0.1 M hydrochloric acid with zinc or mercury.
- They were plutonium, americium ( used today in smoke detectors ), curium ( used in medicine ), berkelium, californium, einsteinium, fermium, mendelevium and nobelium.
- Cation-exchange and solvent extraction studies led to the conclusion that mendelevium was a trivalent actinide with an ionic radius somewhat smaller than that of the previous actinide, fermium.
- The mendelevium atoms are then trapped in a gas atmosphere ( frequently helium ), and a gas jet from a small opening in the reaction chamber carries the mendelevium along.
- The mendelevium atoms are then trapped in a gas atmosphere ( frequently helium ), and a gas jet from a small opening in the reaction chamber carries the mendelevium along.
- Owing to the small amounts of produced mendelevium and all of its isotopes having relatively short half-lives, there are currently no uses for it outside of basic scientific research.
- In 1975, Johansson and Rosengren examined the measured and predicted values for the Thermochromatographic studies with trace quantities of mendelevium by Zvara and H�bener from 1976 to 1982 confirmed this prediction.
- In 1973, mendelevium ( I ) was reported to have been produced by Russian scientists, who obtained it by reducing higher oxidation states of mendelevium with samarium ( II ).
- In 1973, mendelevium ( I ) was reported to have been produced by Russian scientists, who obtained it by reducing higher oxidation states of mendelevium with samarium ( II ).
- All of the remaining mendelevium isotopes have half-lives that are less than an hour, and the majority of these have half-lives that are less than 5 minutes.
- The solvent extraction then proceeds, and while the trivalent and tetravalent lanthanides and actinides remain on the column, mendelevium ( II ) does not and stays in the hydrochloric acid.
- Mendelevium-256, the chemically most important isotope of mendelevium, decays through electron capture 90.7 % of the time and alpha decay 9.9 % of the time.
- Mendelevium-256, the chemically most important isotope of mendelevium, decays through electron capture 90.7 % of the time and alpha decay 9.9 % of the time.
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