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.
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.