[{"from": "human", "value": "What can you tell me about this molecule? [238Pu]"}, {"from": "gpt", "value": "The molecule is an element with the symbol Pu and atomic number 94. It is a rare transuranic radioactive element that normally exhibits six allotropes and four oxidation states. It is also a radioactive poison that accumulates in bone marrow. Plutonium-238 has a half-life of 88 years and emits alpha particles. It is a heat source in radioisotope thermoelectric generators, which are used to power some spacecraft.  (L1840)"}]