تلفظ بین المللی : /ˌizotophˈɑje farɑnˈasim/ تلفظ : [,izotoph'Aje faRAn'asim]
دانشنامه عمومی
فرانسیوم (Fr)عنصری است که هیچ ایزوتوپ پایداری ندارد.Values marked # are not purely derived from experimental data, but at least partly from systematic trends. Spins with weak assignment arguments are enclosed in parentheses.Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values denote one standard deviation, except isotopic composition and st...
