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The metallic lustre exhibited is caused by:

Option: 1

Oscillation of loose electrons


Option: 2

Low ionization energy of Sodium


Option: 3

Excitation of free protons


Option: 4

Existence of body centered cubic lattice


Answers (1)

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When light falls on the surface of sodium, the free electron starts oscillating at its mean position and get excited to higher levels. On returning back to lower levels, it emits light in all directions. Due to this sodium has a characteristic metallic lustre.

Hence, the metallic lustre exhibited by sodium is explained by oscillation of loose electron.

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