Gold is used in electronics because it is a very good conductor. Beside that gold won’t oxidize on the open air and because it is very expensive gold comes in a very small amount.
Mostly you can find gold on the connector pins which are gold plated to prevent oxidation of the contacts.
More about recycling gold you can find on this link.
Beside that gold won’t oxidize on the open air and because it is very expensive gold comes in a very small amount. used hifi
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