Friday, 4 September 2020

material science - What keeps objects made of gold apart?



I was told the following basic facts:




  • Objects made of the same metal don’t fuse in the atmosphere because they form an oxide layer. They do fuse in space.

  • Gold doesn’t oxidize.


Yet, gold nuggets held together also don’t fuse (I can pull them apart without resistance). How does each gold atom “know” which object it belongs to?




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