# Calculating Atomic Masses After Fission Collision

If a particular atom of 235 U is struck by a neutron causing fission to occur, and two of the products are 3 neutrons and 93 Kr what is the atomic number and mass number of the third product?

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...t an atomic number of zero. We also know that the sum of the mass number on the right side should be equal to that on the left side and the same applies to atomic number. so, if 235 from Uranium was bombarded by one neutron to give off 3 neutrons and Kr 93, we can say that the mass number on ...