I think it’s found in the nucleus and has a mass of one amu
Stored in bonds of chemical compounds is the right answer
The lower the frequncy the longer the wavelength the longer the wavelength whoch would probably give you more energy.
if im incorrect im truly sorry
B but im not sure if im 100% correcr
Most organic compounds are made of just 4 elements, which are carbon, hydrogen, oxygen, and nitrogen. (I think, I am not sure)
Hope that helps!!!