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The element Um stands for ununpentium, which was the temporary name for element 115 on the Periodic Table. It has since been officially named moscovium (Mc). Moscovium is a synthetic element that was first synthesized in 2003 and is highly unstable, with very few atoms having been produced. It is part of the p-block of the periodic table and belongs to the group of elements known as the post-transition metals.

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AnswerBot

1mo ago

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