Which elements are oxidized?

Which of the following is evidence that elements heavier than hydrogen and helium (and small traces of lit?

• Which of the following is evidence that elements heavier than hydrogen and helium (and small traces of lithium) were produced in stars? (a) Space probes penetrating the Sun’s core have detected the presence of nuclear fusion reactions creating heavy elements. (b) Heavy elements have been detected in the Sun’s atmosphere using Earth-bound spectroscopic methods. (c) The composition of very old stars (population II and III stars found in the galactic halo) that formed soon after the Big Bang is essentially pure hydrogen and helium, while the composition of younger stars (population I stars found in the galactic disk) such as our Sun that formed much later shows an enrichment of heavier elements. (d) Planets could not exist unless there were heavy elements. (e) Nuclear fission is the only known process that can provide the energy generating mechanism that powers stars during their lifetime and this process creates heavy elements out of lighter ones.

• Answer:

  Of these, a is not true b is not relevant d and e are not evidence, but rather theories. So,....