Question

(d) on + X – 133 Sb + 2 Nb + 9 on Help Greek chemPad

identify the unknown particle x in the following nuclear reaction equation

identify the unknown particle x in the following equation for fission

Answer 1

$^1_0n+ ^A_ZX \rightarrow ^{133}_{51}Sb+^{98}_{41}Nb+9^1_0n$

$^A_ZX$ nuclei has Z number of of protons and A number of nucleons or the mass number of the nucleus. Protons are positively charged.The sum of subscript of the reactant should be equal to the sum of subscript of the product because the charge should be conserved in the nuclear reaction.

$0+Z=51+41+9\times 0$

$\boxed{Z=92}$

The sum of the mass number of the reactants must be equal to the sum of mass number of the products

$1+A=133+98+9\times 1$

$\boxed{A=239}$

Uranium has 92 protons. The unknown particle is $^{239}_{92}U$