(Encyclopedia) gold, metallic chemical element; symbol Au [Lat. aurum=shining dawn]; at. no. 79; at. wt. 196.96657; m.p. 1,064.43℃; b.p. 2,808℃; sp. gr. 19.32 at 20℃; valence +1 or +3.
Gold is very…
(Encyclopedia) thoriumthoriumthôrˈēəm [key] [from Thor], radioactive chemical element; symbol Th; at. no. 90; mass number of most stable isotope 232; m.p. about 1,750℃; b.p. about 4,790℃; sp. gr. 11.…
U.S. Department of State Background Note Index: Geography People History Government and Political Conditions Economy Defense Foreign Relations U.S.-Guinean Relations GEOGRAPHYGuinea is located…
The Titanic isn't the only notable shipwreck (though it is famous for crashing into an iceberg on April 15, 1912, killing over 1,500 people). The Lusitania, a British luxury…
The Iditarod Alaska's marathon sled-dog race by Erin Teare The first Saturday in March marks the beginning of the Iditarod, a one thousand mile sled dog race across Alaska's harsh…
(Encyclopedia) Fergana Valley or Ferghana Valley, region, 8,494 sq mi (22,000 sq km), Central Asia, divided among Uzbekistan, Tajikistan, and Kyrgyzstan. The Fergana Range (part of the Tian Shan…
(Encyclopedia)
CE5
Sierra LeoneSierra Leonesēĕrˈə lēōˈnē, lēōnˈ; sērˈə lēōn [key], officially Republic of Sierra Leone, republic (2015 est. pop. 5,879,000), 27,699 sq mi (71,740 sq km), W Africa.…
