bˌiːɪŋ ðə fˈɜːst pˈiəɹɪəd ˈeɪt ˈɛlɪmənt, ðɪ ʌndɪskˈʌvɚd ˈɛlɪmənt ʌnˌʌnɛnˈɪəm ˈɛlɪmənt wˈʌnhˈʌndɹɪd nˈaɪntiːn ɪz pɹɪdˈɪktᵻd təbi ðə nˈɛkst ˈælkəlˌaɪ mˈɛɾəl ˈæftɚ fɹˈænsiəm ænd bᵻhˈeɪv mˈʌtʃ lˈaɪk ðɛɹ lˈaɪɾɚ kəndʒˈɛnɚz; haʊˈɛvɚ, ɪɾ ɪz ˈɔːlsoʊ pɹɪdˈɪktᵻd tə dˈɪfɚ fɹʌmðə lˈaɪɾɚɹ ˈælkəlˌaɪ mˈɛɾəlz ɪn sˌʌm pɹˈɑːpɚɾiz.
Being the first period 8 element, the undiscovered element ununennium (element 119) is predicted to be the next alkali metal after francium and behave much like their lighter congeners; however, it is also predicted to differ from the lighter alkali metals in some properties.