When a clean iron nail is placed in an aqueous solution of copper (II) sulfate, the nail becomes coated with a brownish-black material. (a). What is the material coating on the iron?(b) What are the oxidizing and reducing agents? (c) Can this reaction be made into a voltaic cell? (d) Write the balanced equation for the reaction. (e) Calculate E∘cell for the process.

beta decay is the answer

answerto predict;

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.