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Question
Which of the following statements are true about metals?
(i) Valence band overlaps with conduction band.
(ii) The gap between valence band and conduction band is negligible.
(iii) The gap between valence band and conduction band cannot be determined.
(iv) Valence band may remain partially filled.
Solution
(i) Valence band overlaps with conduction band.
(ii) The gap between valence band and conduction band is negligible.
(iv) Valence band may remain partially filled.
Explanation:
Gap between valence band and conduction band determines the conductivity of the metals. The electrical conduction through metals depends upon the type of valence band and also the gap between the valence band and conduction band while the valence band may remain partially filled.
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