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(B) The metallic lustre exhibited by sodium is explained by the oscillation of loose electrons.When light falls on the surface of sodium,the free elec

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oscillation of loose electrons

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(B) The metallic lustre exhibited by sodium is explained by the oscillation of loose electrons.When light falls on the surface of sodium,the free electrons present in the metallic lattice start oscillating at their mean positions and get excited to higher energy levels.Upon returning to their lower energy levels,these electrons emit light in all directions.This phenomenon is responsible for the characteristic metallic lustre of sodium.

The metallic lustre exhibited by sodium is explained by

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