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18, which is prepared by reducing a mixture of hafnium(IV) chloride and bismuth chloride with elemental bismuth, having the structure [Bi +] [Bi 5+ 9] [HfCl 2− 6] 3. [5]: 50 Other polyatomic bismuth cations are also known, such as Bi 2+ 8, found in Bi 8 (AlCl 4) 2. [11] There is a true monoiodide, BiI, which contains chains of Bi 4 I 4 units ...
Besides 209 Bi, the most stable bismuth radioisotopes are 210m Bi with a half-life of 3.04 million years, 208 Bi with a half-life of 368,000 years and 207 Bi, with a half-life of 32.9 years, none of which occurs in nature. All other isotopes have half-lives under 1 year, most under a day.
Pentamethylbismuth (or pentamethylbismuthorane [2]) is an organometalllic compound containing five methyl groups bound to a bismuth atom with formula Bi(CH 3) 5. It is an example of a hypervalent compound. The molecular shape is trigonal bipyramid. [3]
In the gas phase BiCl 3 is pyramidal with a Cl–Bi–Cl angle of 97.5° and a bond length of 242 pm. [3] In the solid state, each Bi atom has three near neighbors at 250 pm, two at 324 pm and three at a mean of 336 pm, [4] the image above highlights the three closest neighbours. This structure is similar to that of AsCl 3, AsBr 3, SbCl 3 and ...
Many automatic sprinklers, electric fuses, and safety devices in fire detection and suppression systems contain the eutectic In 19.1-Cd 5.3-Pb 22.6-Sn 8.3-Bi 44.7 alloy that melts at 47 °C (117 °F) [19] This is a convenient temperature since it is unlikely to be exceeded in normal living conditions. Low-melting alloys, such as Bi-Cd-Pb-Sn ...
Timothy Creamer, NASA flight director and astronaut [18] Roger K. Crouch, NASA astronaut who was the payload specialist on two Space Shuttle missions [19] Walter Cunningham, NASA astronaut who was the lunar module pilot on the Apollo 7 mission [20] Steven Hawley, NASA astronaut who flew on five U.S. Space Shuttle flights [21]
The medicine, developed by Qu Huangzhang in 1902, is designated as one of two Class-1 protected traditional Chinese medicines, which gives it 20 years of trade protection in China. [4] Yunnan Baiyao products are manufactured and distributed by a state-owned enterprise , Yunnan Baiyao Group ( SZSE : 000538 ) in Yunnan , China.
They must be hollow and made of metal (usually steel) with a diameter between 70.5 and 80 mm (2.78 and 3.15 in) and a weight between 650 and 800 g (23 and 28 oz). When purchasing competition boules, a purchaser has a choice of a number of characteristics, including the size, weight, and hardness of the boules, as well as the striations ...