They go hydrogen -> helium -> lithium / carbon / oxygen / neon / silicon in some order or another and then explode when they hit iron since there's no more energy to gain by doing iron fusion. You still get some elements heavier than iron after the explosion though.
Helium will still fuse tho. I think most stars collapse bc they can't fuse iron unless they big bois.
They go hydrogen -> helium -> lithium / carbon / oxygen / neon / silicon in some order or another and then explode when they hit iron since there's no more energy to gain by doing iron fusion. You still get some elements heavier than iron after the explosion though.