The presence of which element would indicate that a star is going through a high-mass star life cycle as opposed to a low-mass star life cycle? hydrogen carbon helium iron

Iron

Explanation:

In a high mass star life cycle, there are 5 stages;

Stage 1: hydrogen nuclei combines to form helium

Stage 2: Helium combines to form carbon

Stage 3: carbon used to form heavy metals such as Iron

Stage 4: Supernova explosion

Stage 5: Core of the star collapses

In light mass star life cycle, the core of the star collapses after all the helium combines to form carbon.

chemical properties of thing

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge