Untriseptium (pronounced /ˌuːntraɪˈsɛptiəm/), also known as eka-dubnium or element 137, is a hypothetical chemical element which has not been observed to occur naturally, nor has it yet been synthesised. Due to drip instabilities, it is not known if this element is physically possible. Its atomic number is 137 and symbol is Uts.
The name untriseptium is a temporary IUPAC systematic element name.
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