Question

What causes a material to shine?
long answer type questions​

Answer 1

Answer:

Hello mate!!!

Some metals as a result of oxidation with the atmospheric oxygen form oxides and by which their appearance becomes dull. ✤it's because they are exposed to water an other atmospheric gases. ✤due to this they react with them and loose their shine.

Answer 2

Answer:

Metals are shiny because they have a lot of free (i.e. delocalized) electrons that form a cloud of highly mobile negatively charged electrons on and beneath the smooth metal surface in the ideal case

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