When Iodine-131 emits a β particle will produce Xe-131
Further explanation
Radioactivity is the process of unstable isotopes to stable isotopes by decay, by emitting certain particles,
- alpha α particles ₂He⁴
- beta β ₋₁e⁰ particles
- gamma particles ₀γ⁰
- positron particles ₁e⁰
- neutron ₀n¹
So for reaction Iodine-131 :
[tex]\tt _{53}^{131}I\rightarrow _{-1}^0\beta +_{54}^{131}Xe[/tex]
