When uranium isotope 235/92U is bombarded with neutron it give 89/36Kr three neuton and
Answers
Answer:
after the nucleus absorbs a neutron that usually is a product of another atom's radioactive decay.
The newly-formed fission fragments have highly unstable neutron to proton ratios, which makes them extremely radioactive.
In the case of Uranium-235, nuclear fission creates a wide variety of fission fragments, such as
b
#""_92^235"U" + _0^1"n" -> _56^141"Ba" + _36^92"Kr" + 3_0^1"n"#
#""_92^235"U" + _0^1"n" -> _54^140"Xe" + _38^94"Sr" + 2_0^1"n"#
#""_92^235"U" + _0^1"n" -> _57^143"La" + _35^90"Br" + 3_0^1"n"#
#""_92^235"U" + _0^1"n" -> _55^137"Cs" + _37^96"Rb" + 3_0^1"n"#
#""_92^235"U" + _0^1"n" -> _53^131"I" + _39^89"Y" + 16_0^l
Notice that all these nuclear reactions release additional neutrons, which can then go on and hit other nuclei and cause a chain reaction.
As an interesting fact, Italian physicist Enrico Fermi was the first to achieve nuclear fission in a laboratory. He bombarded uranium with slow neutrons and obtained what he incorrectly identified as radium.
It was actually German radiochemist Otto Hahn that addressed Fermi's error and correctly identified the produced element as barium. It is now known that the initial step in a nuclear fission chain reaction is the formation of an unstable uranium isotope which then fissions in a wide variety of ways.