FiQ By naiajunquera 1898 Marie Curie Polomi (Po) i Radi (Ra) 1913 Berta Karlik i Lise Meinter Isòtop del protoactini (Pa) 1925 Ida Noddack Reni (Re) 1939 Marguerite Perey Franci 1940 Berta Karlik i Lise Meinter Astet (At)