Complex sentence: There has been a suggestion that the electron configuration could be (Rn) 7s 2 5f 14 7p 1: direct measurement is impossible, and calculations have given conflicting results.
Split into simpler sentences: There has been a suggestion that the electron configuration could be (Rn) 7s 2 5f 14 7p 1 instead. Direct measurement is impossible, however, and calculations have given conflicting results.