I have checked Wikipedia and the National Nuclear Data Center and it looks like Iron (Fe) has 28 isotopes. There are 6 additional isotopes that come under the main ones (such as 52mFe under 52Fe) making the total of 34. My question is if there is any possibility that someday more Iron isotopes would be discovered?! Is the technology so advanced that all the isotopes have been discovered?! Or is there a chance that somewhere in universe there exist more isotopes?! I am not sure how they really manage to discover them. Thanks for answering my curious mind!