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has a half-life of approximately 28 seconds
Moldavite (Tektite)
Technetium's atomic number is 43 and its symbol is Tc
arc welding
Einsteinium Element Cube Meteorites has a half-life of approximatelyNamed in honor of Albert Einstein, Einsteinium's atomic number is 99 and its symbol is Es. It is a soft, silvery, paramagnetic metal, and its chemistry is typical of the late actinides. The high radioactivity of einsteinium 253 produces a visible glow and rapidly damages its crystalline metal lattice, with released heat of about 1000 watts per gram. It was discovered as a component of the debris of the first hydrogen bomb explosion in 1952. Its most
