1- Write the isotope needed, by identifying A, Z, X and , to balance the following nuclear fusion reaction: 3/1 H+3/1H--->21/0n+A/Zx
2- Write the isotope needed, by identifying A, Z, and X, to balance the following nuclear fission reaction: 235/92 U+1/0 n--->140/56 Ba+A/Zx+31/0 n