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| # | Natural Radioactivity | Artificial Radioactivity |
|---|---|---|
| 1 | The phenomenon is shown by elements with high atomic no.and high mass no. | The phenomenon is shown by elements having low at-no and low atomic mass no. |
| 2 | Radio active series exist. | Radio active series do not exist. |
| 3 | The emissions are (alpha), (eta) and (gamma). | The emissions are either the positron ((eta)+) or electron ((eta)-) |
| 4 | It is spontaneous phenomenon. Therefore no need of bombardment of projectiles. | Here the bombardment of projectile is must. |
| 5 | K-electron capture is not observed. | K-electron capture is observed. |
| 6 | It is difficult to control. | It can be easily controlled. |
| 7 | The phenomenon is found in natural elements. | The phenomenon is shown by man made elements. |
| 8 | Large amount of energy is released. | Energised particles are to be used. |
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