[{"from": "human", "value": "What can you tell me about this molecule? [241Am]"}, {"from": "gpt", "value": "The molecule is a synthetic element that has the symbol Am and atomic number 95. It is a radioactive metallic element of the actinide series. Eighteen radioisotopes of americium, with mass number from 231 to 249, have been characterized. The most used isotope is Am-241 because it is easiest to produce. Americium is widely used in commercial ionization-chamber smoke detectors as well as in neutron sources and industrial gauges. Americium emits alpha and gamma radiation, which represents a serious health hazard. (L1103)"}]