Under their higher valences, radionuclides of elements such as selenium, technetium, uranium, neptunium and plutonium have a higher solubility and are also often present in water as non-retarded anions.
ˌʌndɚ ðɛɹ hˈaɪɚ vˈeɪlənsᵻz, ɹˌeɪdɪoʊnˈuːklaɪdz ʌv ˈɛlɪmənts sˈʌtʃ ɐz sɛlˈiːniəm, tɛknˈiːɾiəm, jʊɹɹˈeɪniəm, nɛptˈuːniəm ænd pluːtˈoʊniəm hæv ɐ hˈaɪɚ sˌɑːljuːbˈɪlᵻɾi ænd ɑːɹ ˈɔːlsoʊ ˈɔfən pɹˈɛzənt ɪn wˈɔːɾɚɹ æz nˈɑːnɹᵻtˈɑːɹdᵻd ˈænaɪənz.