In stars, fusion continues beyond H+H = He. As the star converts to a majority of He, what other particles can also be f

[answerhappygod]

In stars, fusion continues beyond H+H = He. As the star converts
to a majority of He, what other particles can also be formed if He
and H both exist in the star? After those two particles are formed
and the He/H is running out? What other particles can form from
fusing the two newer/newest particles and with H, He and the second
set of particles.
What "Heavy" atom signifies the dead end of solar fusion and
then the star might go Nova?