The relativistic stabilisation of the 8s orbital also increases ununennium's electron affinity far beyond that of caesium and francium; indeed, ununennium is expected to have an electron affinity higher than all the alkali metals lighter than it.
ðə ɹˌɛləɾɪvˈɪstɪk stˌeɪbɪləzˈeɪʃən ʌvðɪ ˈeɪt z ˈɔːɹbɪɾəl ˈɔːlsoʊ ˈɪŋkɹiːsᵻz ʌnˌʌnɛnˈɪəmz ᵻlˈɛktɹɑːn ɐfˈɪnᵻɾi fˈɑːɹ bᵻjˌɔnd ðæt ʌv sˈiːsiəm ænd fɹˈænsiəm; ˌɪndˈiːd, ʌnˌʌnɛnˈɪəm ɪz ɛkspˈɛktᵻd tə hæv ɐn ᵻlˈɛktɹɑːn ɐfˈɪnᵻɾi hˈaɪɚ ðɐn ˈɔːl ðɪ ˈælkəlˌaɪ mˈɛɾəlz lˈaɪɾɚ ðɐn ɪt.