List these common radiation types from weakest to strongest in terms of penetrability: Alpha, Beta, and Gamma radiation.

Radiation strength can be gauged by the types of material that the radiation can pass through. Alpha radiation has the weakest depth of penetration and can be stopped by most surfaces. Beta radiation can penetrate more deeply than alpha radiation but not as deeply as gamma radiation. One can remember this ranking by thinking in terms of alphabetical order- alpha first, so weakest, beta next, so less weak, etc.