Thus, the trend for the densities of the alkali metals depends on their atomic weights and atomic radii; if figures for these two factors are known, the ratios between the densities of the alkali metals can then be calculated.
ðˈʌs, ðə tɹˈɛnd fɚðə dˈɛnsᵻɾiz ʌvðɪ ˈælkəlˌaɪ mˈɛɾəlz dᵻpˈɛndz ˌɔn ðɛɹ ɐtˈɑːmɪk wˈeɪts ænd ɐtˈɑːmɪk ɹˈeɪdɪˌaɪ; ɪf fˈɪɡjɚz fɔːɹ ðiːz tˈuː fˈæktɚz ɑːɹ nˈoʊn, ðə ɹˈeɪʃɪˌoʊz bᵻtwˌiːn ðə dˈɛnsᵻɾiz ʌvðɪ ˈælkəlˌaɪ mˈɛɾəlz kæn ðˈɛn biː kˈælkjʊlˌeɪɾᵻd.