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Iodine-125 itself has a neutron capture cross section of 900 barns, and consequently during a long irradiation, part of the 125 I formed will be converted to 126 I, a beta-emitter and positron-emitter with a half-life of 12.93 days, [1] which is not medically useful. In practice, the most useful irradiation time in the reactor amounts to a few ...
The YouTube channel is now one of the most popular chemistry related channels on all of YouTube. [7] The producers of the videos have received praise from Nobel Laureates, chemistry professors, and the general public, says Professor Poliakoff. [5] Chemistry Nobel Laureate Roald Hoffmann has even offered his praise of the videos, stating they ...
"Numb" by Linkin Park was the first 2000s video predating YouTube to reach 1 billion views in November 2018. [59] "Bohemian Rhapsody" by Queen was the first 1970s video (and pre-1990s video) to reach 1 billion views in July 2019. [60] "Sweet Child o' Mine" by Guns N' Roses was the first 1980s video to reach 1 billion views in October 2019. [61]
A hot water solution containing 73.1% (mass) of NaOH is a eutectic that solidifies at about 62.63 °C as an intimate mix of anhydrous and monohydrate crystals. [ 21 ] [ 20 ] A second stable eutectic composition is 45.4% (mass) of NaOH, that solidifies at about 4.9 °C into a mixture of crystals of the dihydrate and of the 3.5-hydrate.
This is an accepted version of this page This is the latest accepted revision, reviewed on 4 February 2025. American vlogger and entrepreneur (born 1980) This article is about the American vlogger and entrepreneur. For other people, see Henry Green (disambiguation). Hank Green Green in 2023 Born William Henry Green II (1980-05-05) May 5, 1980 (age 44) Birmingham, Alabama, U.S. Alma mater ...
The subjects covered in the book include: physical properties of chemicals and other materials; mathematics; thermodynamics; heat transfer; mass transfer; fluid dynamics; chemical reactors and chemical reaction kinetics; transport and storage of fluid; heat transfer equipment; psychrometry and evaporative cooling; distillation; gas absorption; liquid-liquid extraction; adsorption and ion ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 27 January 2025. Periodic table of the elements with eight or more periods Extended periodic table Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium ...
The refractive index of liquid water (1.333 at 20 °C (68 °F)) is much higher than that of air (1.0), similar to those of alkanes and ethanol, but lower than those of glycerol (1.473), benzene (1.501), carbon disulfide (1.627), and common types of glass (1.4 to 1.6). The refraction index of ice (1.31) is lower than that of liquid water.