In evolved Asymptotic Giant Branch (AGB) stars, what is the heaviest element primarily produced via the slow neutron capture (s-process)?
Answer
Bismuth ($ ext{Bi}$)
The slow neutron capture process, characterized by a steady source of neutrons, builds up mass slowly and is responsible for roughly half of the elements heavier than iron, extending up to and including bismuth ($ ext{Bi}$).
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