What elements primarily constitute the inert ash left in the core of an intermediate-mass giant star after helium burning ceases?

Answer

Inert carbon and oxygen ash

For intermediate-mass stars that become red giants, once the helium fuel is mostly consumed, the core stabilizes consisting mainly of inert carbon and oxygen ash.

What elements primarily constitute the inert ash left in the core of an intermediate-mass giant star after helium burning ceases?
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