Hello,
I have a newbie question so please explain my ignorance as I know very little about cosmology.
I read that when the big bang happened Hydrogen and Helium were produced and little lithium and beryllium.
They then go onto create heavier elements.
My question is, if this sequence goes on to create heavier and heavier elements, what came before Hydrogen and Helium if anything (the reverse)?
Thankyou