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Iridium is a chemical element; it has symbol Ir and atomic number 77. A very hard, brittle, silvery-white transition metal of the platinum group , it is considered the second-densest naturally occurring metal (after osmium ) with a density of 22.56 g/cm 3 (0.815 lb/cu in) as defined by experimental X-ray crystallography .
A table listing the 17 rare-earth elements, their atomic number and symbol, the etymology of their names, and their main uses (see also Applications of lanthanides) is provided here. Some of the rare-earth elements are named after the scientists who discovered them, or elucidated their elemental properties, and some after the geographical ...
Iridium is a chemical element with symbol Ir and atomic number 77. Iridium may also refer to: Iridium satellite constellation, a satellite group providing voice and data coverage Iridium Communications, the company operating the Iridium satellite constellation; Iridium Jazz Club, in New York City
Symbol; National animal: The European bison (Bison bonasus) is one of the national animals of Poland. The White stork (Ciconia ciconia) has a long history with Poland and is believed to be one of the national animals of the country. Poland's enduring national symbol has been the white-tailed eagle (Haliaeetus albicilla), shown in the coat of ...
QI ' s second book, The Book of Animal Ignorance, was released in the UK (in the same hardback format) by Faber & Faber on 4 October 2007. (ISBN 978-0-571-23370-0) [132] It promised to be a "bestiary for the 21st century," [133] and contains almost completely new quite interesting facts. [134]
Official symbol since 1996 [20] Additional national symbol [20] Maple leaf: De facto symbol since the 1700s [20] National animals [20] North American beaver: Official symbol since 1975 [20]] Canadian horse: Official symbol since 2002 [20] National sport [20] [36] Lacrosse (summer) Officially adopted on May 12, 1994 [20] Ice hockey (winter)
The Four Symbols are mythological creatures appearing among the Chinese constellations along the ecliptic, and viewed as the guardians of the four cardinal directions. These four creatures are also referred to by a variety of other names, including " Four Guardians ", " Four Gods ", and " Four Auspicious Beasts ".
This is a list of symbols of the United States Commonwealth of Virginia. Most of the items in the list are officially recognized symbols created by an act of the Virginia General Assembly and signed into law by the governor. The state nickname, The Old Dominion, is the oldest symbol. However, it is the only symbol that is not official.