Meitnerium:
Meitnerium is a chemical element with symbol Mt and atomic number 109. It is an extremely radioactive synthetic element (an element not found in nature that can be created in a laboratory). The most stable known isotope, meitnerium-278, has a half-life of 7.6 seconds.
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䥑:
䥑是一種人工合成的放射性化學元素，化學符號是Mt，原子序是109。
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Meitnerium䥑