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Originally Posted by Droxx
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More like lead and mercury.
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The atomic weight of lead is 207, mercury is 200. Plutonium's atomic weight is 244, and according to some scientists is the heaviest metal which naturally occurs on the planet earth.
http://www.scientificamerican.com/ar...nic-elements-s
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In 1971, Darlene Hoffman of Los Alamos National Laboratory discovered trace quantities of another isotope of plutonium in the environment. Pu-244 was found in Precambrian Age phosphate from southern California. This isotope of plutonium had a radioactive half-life of 80 million years. Scientists have postulated that, because of its long radioactive half-life, this isotope has existed since the creation of Earth about 4.5 billion years ago.
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