How did all the elements formed in whole universe

Well, I believe that you all have once curious about from where did all the elements come from, so basically, the universe itself created all the elements that let us find out how. 

         Fig1:- history of our universe

Everything in this universe is started with a boom called The big bang. 

But at that time energy lies in the pure form, but as time goes on universe cooled down and Making fundamental building block of matter i.e proton and electron 

Which combined into the simplest atom of entire periodic table The hydrogen atom.

      Fig2:- pictorial representation of                                   hydrogen  atom

After hydrogen is formed, it exists in gas clouds,  here gravity came into action, it collapsed the gas clouds of hydrogen because  this collapsing, pressure and temperature increased by high rate and 

we all know that the hydrogen is a highly combustible gas, this high pressure and temperature started a chain reaction of nuclear fusion.

This nuclear fusion form heavy elements in the core of the star 

Firstly, hydrogen then helium, carbon, oxygen, neon,....., At last iron. You will be shocked if I tell you that piece of iron you see around had killed a star in history, but that true.

So we get elements till the iron but what about copper other elements these elements are formed in 2nd generation stars called red supergiant . 

Now,other heavy element  like copper, gold, iridium and many more are formed by the collion of neutron star.   

 Fig4:- colliding neutron star

Now its clear that  we all are formed by dying stars.

Once Carl Sagan said that we are stardust And it's true  

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