Isotope X is radioactive. Which statement about X has to be correct?
- AA nucleus of X is unstable.
- BX emits $\alpha$-particles.
- CX emits $\beta$-particles.
- DX emits $\gamma$-radiation.
Physics 0625 · IGCSE · Radioactivity
Isotope X is radioactive. Which statement about X has to be correct?