WebThorium-234 has a half-life of 24 days. If you started with a 100-g sample of thorium-234, how much would remain after 48 days? 25 g which of the following elements is most likely to be produced during a nuclear fusion reaction in the sun? helium-4 Natural thorium is usually almost pure 232 Th, which is the longest-lived and most stable isotope of thorium, having a half-life comparable to the age of the universe. Its radioactive decay is the largest single contributor to the Earth's internal heat ; the other major contributors are the shorter-lived … See more Thorium is a weakly radioactive metallic chemical element with the symbol Th and atomic number 90. Thorium is silvery and tarnishes black when it is exposed to air, forming thorium dioxide; it is moderately soft and See more All but two elements up to bismuth (element 83) have an isotope that is practically stable for all purposes ("classically stable"), with the exceptions being technetium See more Formation Th is a primordial nuclide, having existed in its current form for over ten billion years; it was formed during the r-process, which probably occurs in supernovae and neutron star mergers. These violent events scattered it across … See more The low demand makes working mines for extraction of thorium alone not profitable, and it is almost always extracted with the rare earths, which themselves may be by-products of production of other minerals. The current reliance on monazite for production is due to … See more Thorium is a moderately soft, paramagnetic, bright silvery radioactive actinide metal. In the periodic table, it lies to the right of actinium, to the left of protactinium, and below cerium. Pure thorium is very ductile and, as normal for metals, can be cold-rolled See more A thorium atom has 90 electrons, of which four are valence electrons. Four atomic orbitals are theoretically available for the valence electrons … See more Erroneous report In 1815, the Swedish chemist Jöns Jacob Berzelius analysed an unusual sample of gadolinite from a copper mine in Falun, central Sweden. He noted impregnated traces of a white mineral, which he cautiously assumed … See more
Half-Life Calculator
WebNov 8, 2024 · Vocabulary. Alpha decay - A common mode of radioactive decay in which a nucleus emits an alpha particle (a helium-4 nucleus). Beta decay - A common mode of radioactive decay in which a nucleus emits beta particles. The daughter nucleus will have a higher atomic number than the original nucleus. WebJun 5, 2024 · The radioactive element thorium-234 has a half-life of approximately 24 days. If I started with 82 grams of it, how much thorium would remain after 96 days? Chemistry. 1 Answer Junaid Mirza Jun 5, 2024 #"5.125 g"# Explanation: If #96# days is #"n"# half lives then #"n" = "96 days"/("24 days/half life") = "4 half lives"# ... 動画圧縮 画質そのまま サイト
Half-Life Calculator
WebUranium-234 is an isotope of uranium. The path of production of 234 U via nuclear decay is as follows: 238 U nuclei emit an alpha particle to become thorium-234 . Next, with a short half-life , a 234 Th nucleus emits a beta particle to become protactinium-234 . Web14) Uranium-238 ( 92") decays to form thorium-234 ( 90 h) with a half-life of 4.5 x 10° years. How many years will it take for 75% of the uranium-238 to decay? а) 9.0х 10 years с) 9.0х10° years b) 4.5 x 10° years d). 3.8 х 10° усаrs Expert Solution Want to see the full answer? Check out a sample Q&A here See Solution star_border WebThis isotope has a half-life of about 245,000 years. The next decay product, thorium-230 (230 Th), has a half-life of about 75,000 years and is used in the uranium-thorium technique. Although analytically simpler, in practice 234 U/ 238 U requires knowledge of the ratio at the time the material under study was formed and is generally used only ... aws ec2 docker インストール