What is my pet rocks name

Gunpowder residue is most likely to show up where on a shooters hands

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a. a piece of paper b. a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?