Americium. A completely man-made radioactive actinide with atomic symbol am, atomic number 95, and atomic weight 243. Its valence can range from +3 to +6.

Because of its nonmagnetic ground state, it is an excellent superconductor. It is also used in bone mineral analysis and as a radiation source for radiotherapy.

Chemical name: Americium

Atomic weight: 243

(12 Dec 1998)

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