State one difference between nuclear fission and nuclear fusion.

 State one difference between  nuclear fission and nuclear fusion.

Solution: 

Nuclear Fission	Nuclear Fussion
Nucleus of a heavy isotope element is split into two nuclei of nearly equal mass by neutron bombardment of the heavy nucleus.	Two or more light isotopes of nuclei elements fuse or combine to form a heavier nucleus.
Example	Examples
U   +   nà  UàBa + Kr + 2n + Energy.	Li + H à 2He + Energy
235    1     236  144  90     1	6    2   or 4
92      0       92    56   36     0	3    1         2
	H   +   H àHe +n + energy
	2         2       3 or 1
	1         1       2      0
	D   +   T à He +  n  + energy
	2         3      3         1
	1         1      2         0

 Tips: Question like this should be answered on a table.

QUESTION SOURCE: WAEC THEORY QUESTION 1988 QUESTION 3 (b)