This makes francium's outermost electron feel more attraction from the nucleus, increasing its first ionisation energy slightly beyond that of caesium.)
ðɪs mˌeɪks fɹˈænsiəmz ˈaʊɾɚmˌoʊst ᵻlˈɛktɹɑːn fˈiːl mˈoːɹ ɐtɹˈækʃən fɹʌmðə nˈuːklɪəs, ɪŋkɹˈiːsɪŋ ɪts fˈɜːst ˌaɪənəzˈeɪʃən ˈɛnɚdʒi slˈaɪtli bᵻjˌɔnd ðæt ʌv sˈiːsiəm.