• Both U-235 and U-238 are fissile but only U-235 can sustain chain reactions

  • Only U-235 is fissile and can sustain chain reaction but U-238 is fertile

  • U-238 can be used in chain reactions only after extracting U-235 from it

  • Uranium enrichment is a process where concentration of U-238 is increased using some chemical processes


Only U-235 is fissile and can sustain chain reaction but U-238 is fertile