potential energy because it has a potential to roll down the hill, creating kinetic energy. it is idle
Covalent bonds are shown in the left part of row 1 while ionic ones on the right side
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.
