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Thulium's atomic number is 69 and its symbol is Tm
the bomb was a plutonium implosion-type device with a yield of approximately 20 kilotons of TNT
It is usually mined from a mineral called monazite
has a half-life of approximately 28 seconds
and it is an extremely radioactive synthetic element
Meitnerium Element Cube Subscriptions Thulium's atomic number is 69Meitnerium's atomic number is 109 and its symbol is Mt. It is an extremely radioactive synthetic element, an element not found in nature but can be created in a laboratory. The most stable known isotope, meitnerium 278, has a half life of 4. 5 seconds. Named after Lise Meitner. It was discovered on August 29, 1982, by a German research team at the Institute for Heavy Ion Research. Other than nuclear properties, no properties of meitnerium or its
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