Mystery #3Tier 1rust and reactivity
Why do gold and silver keep their shine for centuries while iron crumbles into rust?
A gold coin from a sunken ship comes up gleaming after hundreds of years underwater. An iron anchor from the very same wreck comes up as a swollen lump of orange crumble. Both sat in the same cold sea for the same long time. So why does iron rot away into rust while gold and silver keep their shine for centuries?
Your guess
Why do you think iron rusts away while gold and silver stay shiny?
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