1 - nm - physics - s2\nwhen a high - mass main sequence star runs out of both hydrogen and helium in its…

1 - nm - physics - s2\nwhen a high - mass main sequence star runs out of both hydrogen and helium in its core, the core begins to fuse\nwhen nuclear fusion ends in a high - mass star, the heavy elements formed in the star’s core are released through a

1 - nm - physics - s2\nwhen a high - mass main sequence star runs out of both hydrogen and helium in its core, the core begins to fuse\nwhen nuclear fusion ends in a high - mass star, the heavy elements formed in the star’s core are released through a

Answer

Brief Explanations:

In high - mass stars, after hydrogen and helium in the core are exhausted, carbon fusion begins. When nuclear fusion ends in a high - mass star, a supernova explosion occurs which releases heavy elements formed in the core.

Answer:

  1. Carbon
  2. Supernova explosion