Question

Why metals are lustorous?EXPLAIN

Answer 1

Metal is shiniest when it is first cut. Exposure to elements such as oxygen and carbon cause metals to lose the luster on the surface because the elements cause a tarnish that reduces the freedom of the electrons to vibrate. The tarnish is removable through polishing or using a chemical treatment. Some metals, those known as "noble metals," are more resistant to tarnishing caused by elements.

Answer 2

• The electrons that are farthest from the nucleus give a metal its shine.
• Light reflects, or bounces off, these outer electrons.
• This makes the metal appear shiny.
• This shiny appearance on the surface of some metals is called luster.

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