This article is about Aktinum. Thorium and uranium are the largest actinium elements in nature.The concentration of each mass is 1.6 × 10^%and 4 × 10^%.Uranium comes mainly from oxidized minerals in crust.A well -known ore is Peach Blend (Ura Night).The reason why it is called Peach Blend is because it is black.Classification: You can see more ore in uranium minerals.There are also Karnotite (Kuo2vo4 · 3H2O) or Uranium light (CA (UO2) 2 (PO4) 2 (PO4) 2, NH2O).Natural uranium isotopes include U (ratio: 99.2742%), U (0.7204%) and U (0.0054%).U has a half -life of the longest 4.51 × 10^of the isotopes.Kazakhstan is the country that produces the most uranium worldwide.As of 2009, 50,572 tons (about 27.3%worldwide) mine uranium ore.Other important uranium mining cities include Canada (20.1%), Australia (15.7%), Namibia (9.1%), Russia (7.0%), and Niger (6.4%).
What color is the pitch blend?
black