Unsepttrium, element 173, may be an even better heavier homologue of ununennium; with a predicted electron configuration of [Usb] 6g1, it returns to the alkali-metal-like situation of having one easily removed electron far above a closed p-shell in energy, and is expected to be even more reactive than caesium.
ʌnsˈɛptɹiəm, ˈɛlɪmənt wˈʌnhˈʌndɹɪd sˈɛvənti θɹˈiː, mˈeɪ biː ɐn ˈiːvən bˈɛɾɚ hˈɛviɚ hˈɑːməlˌɑːɡ ʌv ʌnˌʌnɛnˈɪəm; wɪð ɐ pɹɪdˈɪktᵻd ᵻlˈɛktɹɑːn kənfˌɪɡjɚɹˈeɪʃən ʌv jˌuːˌɛsbˈiː sˈɪks dʒˈiː wˈʌn, ɪt ɹᵻtˈɜːnz tə ðɪ ˈælkəlˌaɪmˈɛɾəllˈaɪk sˌɪtʃuːˈeɪʃən ʌv hˌævɪŋ wˈʌn ˈiːzili ɹᵻmˈuːvd ᵻlˈɛktɹɑːn fˈɑːɹ əbˌʌv ɐ klˈoʊzd pˈiːʃˈɛl ɪn ˈɛnɚdʒi, ænd ɪz ɛkspˈɛktᵻd təbi ˈiːvən mˈoːɹ ɹɪˈæktɪv ðɐn sˈiːsiəm.