Final answer:
The equation that represents what happens during a star's supernova phase is Iron(26) + Chromium(24) = Tin(50).
Step-by-step explanation:
The star chemistry equation that represents what happens during a star's supernova phase is Option A: Iron(26) + Chromium(24) = Tin(50).
During a supernova, massive stars undergo a rapid and violent explosion. This explosion leads to the synthesis of heavier elements and the release of a tremendous amount of energy. In Option A, the combination of iron and chromium results in the formation of tin, representing a possible reaction during a star's supernova phase.