A) Light nuclei
B) Heavy nuclei
C) Elements lying in the middle of periodic table
D) Elements lying in the middle of binding energy curve
Correct Answer: A
Solution :
Binding energy for light nuclei (A < 20) is much smaller than the binding energy for heavier nuclei. This suggests a process that is reverse of fission. When two light nuclei combine to form a heavier nucleus, the process is called nuclear fusion. The union of two light nuclei into heavier nuclei also lead to a transfer of mass and a consequent liberation of energy. Note: Fusion reaction can take place at very high temperature \[(\approx {{10}^{8}}\,K)\] and very high pressure which can be provided at sun or by fission of atom bomb.
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