Shine at freshly cut sodium is because of : - Vidyadip

MCQ

Shine at freshly cut sodium is because of :

✓
due to oscillations of free electrons.
B
due to weak metallic bonding.
C
due to absorption of light in crystal lattice.
D
due to the presence offree valency at the surface.

✓

Answer

Correct option: A.

due to oscillations of free electrons.

Freshly cut sodium metal has a bright, shiny surface due to the oscillations of free electrons that quickly becomes a dull grey as it reacts with oxygen in the air around it. Over time, the metal becomes covered with a white crust of sodium oxide that prevents further reaction of the metal and oxygen.

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