neutrons were given by the following symbol: n.An alpha particle (a helium atom) is designated as He or a 239 The collision of Pu with an alpha particle generates a new isotope and one neutron. What is the new 94 isotope that is produced in this nuclear reaction? U +n Zr+ 235 +3n 94 92 40 235 U +n "Se+ 89 +3 n 92 34 235 U +n Sr+ 90 +2 n 92 38 Np CeTe Zr 235 144 XeTh 144 90 52 40 Cs Kr Se Xe Sr 144 89 143 90 34 38