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On August 20, 1942, a trace quantity of this element was isolated and measured for the first time. About 50 micrograms of plutonium-239 combined with uranium and fission products was produced and only about 1 microgram was isolated. [54] [81] This procedure enabled chemists to determine the new element's atomic weight.
[citation needed] Tests of tube wells in Sylhet District by the Bangladesh University of Engineering and Technology in 1997 found that about 27.6% contained more arsenic than the acceptable limit set by Bangladesh of 50 micrograms per liter, and 49.2% contained more arsenic than the World Health Organization standard of 10 micrograms per liter ...
Country (or territory) CIA [2] [3] 2023–2024 WB [4] 2023 UN [5] 2005–10 UN [5] 2010–15 UN [5] 2015–20 ; Year World 1.17: 0.9: 1.23: 1.19: 1.09 Afghanistan 2.22: 2024: 2.7: 2.78: 3.16: 2.41 ...
In rare cases, individuals may become stateless upon renouncing their citizenship (e.g., "world citizen" Garry Davis and, from 1896 to 1901, Albert Einstein, who, in January 1896, at the age of 16, was released from his Württemberg citizenship after, with his father's help, filing a petition to that effect; in February 1901 his application for ...
Barranquilla (Latin American Spanish pronunciation: [baraŋˈkiʝa] ⓘ) is the capital district of the Atlántico department in Colombia.It is located near the Caribbean Sea and is the largest city and third port [5] in the Caribbean coast region; as of 2018, it had a population of 1,206,319 [6] [2] making it Colombia's fourth-most populous city after Bogotá, Medellín, and Cali.
Shanghai [a] is a direct-administered municipality and the most populous urban area in China.The city is located on the Chinese shoreline on the southern estuary of the Yangtze River, with the Huangpu River flowing through it.
Boston [a] is the capital and most populous city in the Commonwealth of Massachusetts in the United States.The city serves as the cultural and financial center of New England, a region of the Northeastern United States.
Seoul, [b] officially Seoul Special Metropolitan City, [c] is the capital and largest city of South Korea.The broader Seoul Metropolitan Area, encompassing Seoul, Gyeonggi Province and Incheon, [8] emerged as the world's sixth largest metropolitan economy in 2022, trailing behind Paris, San Francisco, Los Angeles, Tokyo, and New York, and hosts more than half of South Korea's population.