Uranium-238 | chemical isotope (2024)

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In both team and solo sports, the human body has been pushed to its limits in the name of improving athletic performance and in order to break record upon record. The ancient Olympic Games are an early example of the contests in which humans have engaged to showcase physical prowess. In modern times, sports and games have evolved into a lucrative and competitive industry, while other leisure activities, such as card and video games, can be competitive or just serve as a way to unwind or socialize.","image":{"id":0,"url":"/13/170713-131-8D6B0AF7.jpg","altText":"Sports & Recreation","credit":null,"width":null,"height":null,"fullUrl":"https://cdn.britannica.com/13/170713-131-8D6B0AF7.jpg"}},null,null],"mainCategory":{"id":4000,"title":"Sports & Recreation","url":"Sports-Recreation","description":"Physical contests and recreational games have long played a part in human society. 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In modern times, sports and games have evolved into a lucrative and competitive industry, while other leisure activities, such as card and video games, can be competitive or just serve as a way to unwind or socialize.","image":{"id":0,"url":"/13/170713-131-8D6B0AF7.jpg","altText":"Sports & Recreation","credit":null,"width":null,"height":null,"fullUrl":"https://cdn.britannica.com/13/170713-131-8D6B0AF7.jpg"}},"typeDisplayName":"List"}]},"byline":null,"citationInfo":null,"websites":{"EXTERNAL":[{"title":"University of Michigan Library - Deep Blue Repositories - U-235 and U-238 isotopic fractions of natural Uranium throughout geological time","url":"https://deepblue.lib.umich.edu/bitstream/handle/2027.42/163723/ScholardoxB1.pdf?","newTab":true}]},"freeTopicReason":"TOPIC_IS_INDEX_PAGE","articleSchemaMarkup":{"keywords":"uranium-238","wordcount":0,"url":"https://www.britannica.com/science/uranium-238","description":"Other articles where uranium-238 is discussed: breeder reactor: …a breeder reactor employs either uranium-238 or thorium, of which sizable quantities are available. Uranium-238, for example, accounts for more than 99 percent of all naturally occurring uranium. In breeders, approximately 70 percent of this isotope can be utilized for power production. Conventional reactors, in contrast, can extract less than…","publisher":{"name":"Encyclopedia Britannica","@type":"Organization","logo":{"url":"https://corporate.britannica.com/wp-content/themes/eb-corporate/_img/logo.png","@type":"ImageObject"}},"@context":"https://schema.org","@type":"article"},"studentArticle":false,"showHeader":true,"initialLoad":true,"comingFromSameArticle":false}