I think the answer is C. An element or compound that cannot be physically separated. Sorry if im wrong.
Answer:
I'm thinking Henri's wave and Geri's wave have the same amplitude and energy, but i'm not %100 sure
Explanation:
I would say the last one because unlike beta and alpha rays they will have no effect on the mass or atomic number because they are just composed of high energy radiation
I believe the answer is increases , decreases