Sanny wrote in news:1193206569.069432.204420
@e34g2000pro.googlegroups.com:

I read somewhere, nuclie collide with each other to produce nuclear
reaction the same way as chemical reaction occurs.

Not in the same why. Chemical reactions are mediated by the electromagnetic
force compare to nuclear reactions which are mediated by the weak and
strong nuclear forces.


Chemical Reaction

H+H - H2

O+O -O2

2H2 + O2 - 2H2O

Simmilarly Nuclear Reaction occur.

H1+H1 - He {fusion}

U238 - U235 {fission}
SNIP
And is it possible for Iron nucle to fuse together to give even higher
Elements? And where in our universe these reactions take place.

No. Elements heavier than Iron are produced by endothermic neutron capture
plus a bunch of decays.

Read these to get started:

http://en.wikipedia.org/wiki/Proton-...chain_reaction
http://en.wikipedia.org/wiki/CNO_cycle
http://en.wikipedia.org/wiki/Triple-alpha_process
http://en.wikipedia.org/wiki/S-process
http://en.wikipedia.org/wiki/R-process
http://en.wikipedia.org/wiki/Supernova_nucleosynthesis
http://en.wikipedia.org/wiki/Type_Ia_supernova
http://en.wikipedia.org/wiki/Type_II_supernova
http://en.wikipedia.org/wiki/Big_Bang_nucleosynthesis