isotope specific activity isotope structure isotope technique isotope-tracer measurement isotopic isotopic abundance isotopic analysis isotopic atomic weight isotopic dating isotopic equilibrium isotopic invariance isotopic number isotopic species isotopism isotopy isotron isotropic isotropic antenna isotropic body isotropic conductivity |
isotope specific activity специфична радиоактивност на изотоп Търсената дума е намерена |