Nuclides having different no. of atomic no.s and mass no.s but the difference between the no. of neutrons and no. of protons is same...They are called isodiaphers.
Take for example, 90Th234 and 92U238
sandeep
9 Years ago
these are the atoms of different elements which possess the same isotopic excessisotopic excess=no. of neutrons(n)-no. of protons(p)