Question: 1) Fusion requires extremely high temperatures to begin because ____. A) positive nuclei repel each other B) nuclei without neutrons can't create larger nuclei that

1) Fusion requires extremely high temperatures to begin because ____. 
A) positive nuclei repel each other 
B) nuclei without neutrons can't create larger nuclei that DO contain neutrons 
C) hydrogen and helium are gases 
D) releasing more energy requires a greater input of energy first E) electrons interfere with the process 


2) A nucleus of Uranium-235 nucleus of U-235 undergoes alpha decay. Write the decay equation for that reaction. 


3) A nucleus of Th-231 undergoes beta decay. Write the decay equation that explains this

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