The investigations at Bristol, applying isotope tests on tooth enamel, checked whether she was born and brought up in Wessex and Mercia, as written history has indicated.
Technetium, a chemical element with atomic number 43 and symbol Tc.
Technetium was formally discovered in December 1936 by Carlo Perrier and Emilio Segré, who discovered Technetium-95 and Technetium-97.