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Hace 1 día · Platinum is a member of the platinum group of elements and group 10 of the periodic table of elements. It has six naturally occurring isotopes. It is one of the rarer elements in Earth's crust, with an average abundance of approximately 5 μg /kg. It occurs in some nickel and copper ores along with some native deposits, mostly in South Africa ...
Hace 1 día · Troy (Turkish: Troya, Greek: Τροία, Hittite: 𒋫𒊒𒄿𒊭 Truwiša/Taruiša) or Ilion (Greek: Ίλιον, Hittite: 𒌷𒃾𒇻𒊭 Wiluša) was an ancient country located in present-day Hisarlık, Turkey.The place was first settled around 3600 BC and grew into a small fortified city around 3000 BC. During its four thousand years of existence, Troy was repeatedly destroyed and rebuilt.