Plutonium.



Cost: about $ 4,000 per gram. Heavy fragile radioactive metal silver-white color. In the periodic table is in the family of actinides. Widely used in the manufacture of nuclear weapons, nuclear fuel for civilian nuclear reactors and research destination and as a source of energy for spacecraft. Plutonium is very often used in nuclear bombs. The historical fact is dumping nuclear bomb on Nagasaki in 1945, the United States. The bomb dropped on the city, containing the 6, 2 kg of plutonium. Power of the explosion was 21 kilotons.

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