[{"from": "human", "value": "Describe this molecule. [O-1][Cr][=Branch1][C][=O][=Branch1][C][=O][O-1].[Pb+2]"}, {"from": "gpt", "value": "The molecule is a chemical compound of lead and chromium commonly found in paints under the name \"chrome yellow\". It is made by reacting a lead(II) salt with a chromate or dichromate salt in solution. Lead is a heavy metal and stable element with the symbol Pb and the atomic number 82, existing in metallic, organic, and inorganic forms. It is mainly found in nature as the mineral galena (PbS), cerussite (PbCO3) or anglesite (PbSO4), usually in ore with zinc, silver, or copper. Hexavalent chromium refers to chemical compounds that contain the element chromium in the +6 oxidation state. Chromium(VI) is more toxic than other oxidation states of the chromium atom because of its greater ability to enter cells and higher redox potential. (L16, L21, L53)"}]