Physical constant; the most probable distance between an electron and the nucleus in a nonrelativistic model of the hydrogen atom with infinitely heavy nucleus
fizika konstanto; la plej probabla distanco inter la elektrono kaj la kerno en nerelativeca modelo de la hidrogena atomo kun nefinie peza kerno (eo)
fizikai állandó (hu)
physical constant; the most probable distance between an electron and the nucleus in a nonrelativistic model of the hydrogen atom with infinitely heavy nucleus (en)