Question

difference between nuclear fusion and fission?

Answer 1

in nuclear fussion small, light nuclei combine to form large and heavy nucleus with a realise of large amount of large amount of heat and light energy
while in nuclear fission large and heavi nucleus split down into samll and light nuclei.

HOPE IT HELPS
THANK YOU.

#adarsh____/\___

Answer 2

nuclear fusion is a reaction in which two atoms combine together to form  a big nucleus . mass is converted into energy . 
in fission reaction the nucleus divide to form many atoms .