ok yes ok yesssssssssssssssssssss
The penetrating power of alpha rays, beta rays, and gamma rays varies greatly. Alpha particles can be blocked by a few pieces of paper. Beta particles pass through paper but are stopped by aluminum foil. Gamma rays are the most difficult to stop and require concrete, lead, or other heavy shielding to block them.
Maybe to not get rained on.
Hahhahahaha I ain't sure tho
Matematically speaking, maybe because:
The number of substances = number of elements + number of different combinations of those elements
All scientists try to base their conclusions on data and measurements.