Polonium-210 (²¹⁰₈₄Po) is a radioactive isotope that decays by emitting alpha radiation.
Which is the correct decay equation for polonium-210?
Tick (✔) one box.

1. Recall what an alpha particle is. It is a helium nucleus, represented as ⁴₂He. 2. Understand what happens during alpha decay: the nucleus emits an alpha particle. 3. Apply the conservation laws: - The total mass number (top number) must be the same on both sides of the equation. - The total atomic number (bottom number) must be the same on both sides. 4. Check each option: - For the new nucleus X, its mass number will be 210 - 4. - Its atomic number will be 84 - 2. 5. Select the option that matches your calculation.