Question

Fusion reactions take lace at high temperature because

• A. atoms are ionized at high temperature
• B. molecules break up at high temperature
• C. nuclei break up at high temperature
• D. kinetic energy is high enough to overcome repulsion between nuclei

Answer 1

Answer: (D)

kinetic energy is high enough to overcome repulsion between nuclei

Extremely high temps needed for fusion because $K.E.$ should large enough to overcome repulsion between nuclei.