When a uranium-235 nucleus absorbs a neutron, it becomes unstable and undergoes fission. One possible fission process produces a xenon (Xe) nucleus, a strontium (Sr) nucleus, and 2 neutrons.
The fission process is represented by the nuclear equation below:
01n+92235U→54140Xe+ZASr+2 01n ^{1}_{0}\text{n} + ^{235}_{92}\text{U} \rightarrow ^{140}_{54}\text{Xe} + {}^{A}_{Z}\text{Sr} + 2\,^{1}_{0}\text{n} 01n+92235U→54140Xe+ZASr+201nWhich symbol represents the resulting strontium nucleus?
3694Sr^{94}_{36}\text{Sr}3694Sr
3894Sr^{94}_{38}\text{Sr}3894Sr
3896Sr^{96}_{38}\text{Sr}3896Sr
3892Sr^{92}_{38}\text{Sr}3892Sr
284 exam-style questions on CIE IGCSE Physics 5.1 The nuclear model of the atom, covering 5.1.1a Structure of the atom and ions, 5.1.1b Alpha-particle scattering, 5.1.2a Composition of the nucleus and isotopes, 5.1.2b Proton number, nucleon number and nuclide notation, and 5.1.2c Nuclear fission and nuclear fusion. Each one has a worked solution and a mark scheme showing where the marks go.