1) Atomic number 105 2) Chemical element 3) Element 4) Element 105 5) Element number 105 6) Unnilpentium 7) Unnilquintium Found on https://www.crosswordclues.com/clue/hahnium
Name proposed for the artificially made element 105. ... Origin: Otto Hahn, Ger. Physical chemist and Nobel laureate, 1879-1968 ... (05 Mar 2000) ... Found on http://www.encyclo.co.uk/local/20973