Which elements can be made in the core of a star after the hydrogen is used as fuel? Select four answers.irongoldsiliconcarbonoxygenhydrogen

After a star uses up hydrogen in its core, it can fuse heavier elements in stages. This process can produce carbon and oxygen, then silicon, and eventually iron in massive stars. Gold is not made by ordinary fusion in a star’s core, and hydrogen is the fuel that has already been used up.

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