hahnium
[ hah-nee-uhm ]
nounChemistry, Physics.
a proposed but never officially adopted name for element 105, which was instead named dubnium. Symbol: Ha
Origin of hahnium
1- See also unnilpentium.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
British Dictionary definitions for hahnium
hahnium
/ (ˈhɑːnɪəm) /
noun
a name once advanced by the American Chemical Society for a transuranic element, artificially produced from californium, atomic no: 105; half-life of most stable isotope, 262 Ha: 40 seconds: Now called dubnium
Origin of hahnium
1C20: named after Otto Hahn
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Browse