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Though slightly longer-lived isotopes exist, they are much more difficult to produce. Polonium’s intense radioactivity makes it dangerously toxic. About one in 100,000 alpha emissions causes an excitation in the nucleus which then results in the emission of a gamma ray with a maximum energy of 803 keV. The alpha form of solid polonium.

50 of those are known. They are soluble in the corresponding hydrogen halides, i. Tetrahalides can be obtained by reacting polonium dioxide with HCl, HBr or HI. It was Curie’s hope that naming the element after her native land would publicize its lack of independence.