protactinium
... that in 1926, Lise Meitner , a co-discoverer of protactinium, became Germany's first female full professor in physics?
... that in 1926, <a href="./Lise_Meitner" id="mwFQ8" rel="mw:WikiLink" title="Lise Meitner">Lise Meitner</a> <i id="mwFRA">(pictured)</i>, a co-discoverer of <b id="mwFRE"><a href="./Protactinium" id="mwFRI" rel="mw:WikiLink" title="Protactinium">protactinium</a></b>, became Germany's first female full professor in <a href="./Physics" id="mwFRM" rel="mw:WikiLink" title="Physics">physics</a>?