[{"from": "human", "value": "Provide a brief overview of this molecule. [Pu]"}, {"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. (L1840)"}]