Is a radioactive particle affected by amount of a substance?

Yes, the amount of a radioactive substance can affect the overall emission of radioactive particles, as a larger quantity typically results in more decay events and thus more emitted particles. However, the decay rate of a specific radioactive isotope is constant and independent of the amount present, governed by its half-life. Therefore, while the total activity (or radiation emitted) increases with more material, the individual decay process of each atom remains unchanged.