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radioactive metalloid element, symbol Po, in group 16 (or
VIa) of the periodic table (see Because most polonium isotopes disintegrate by emitting alpha particles, the element is a good source of pure alpha radiation. It is also used in nuclear research with elements such as beryllium that emit neutrons when bombarded by alpha particles. In printing and photography equipment, polonium is used in devices that ionize the air to eliminate accumulation of electrostatic charges.
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ENCYCLOPEDIA:
POLONIUM,
Polonium melts at about 254° C (about 489° F), boils at about 962° C (about 1764° F), and has a sp.gr. of 9.4. Polonium is one of the elements in the uranium-radium series of radioactive decay, the first member of which is uranium-238. Polonium-210 (also called radium-F), . . .ADVERTISEMENT
