Q.

In a metallic crystal the

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a

Valence electrons remain within the fields of influence of their own kernels

b

Kernels as well as the electrons move rapidly

c

Valence electrons are localized between the two kernels

d

Valence electrons constitute a sea of mobile electrons

answer is D.

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Detailed Solution

The outer shell electrons in a metallic crystal tend to be delocalized, that is they are loosely bound to their nuclei. Metal atoms consists of an array of positive ions immersed in a sea of delocalized valence electrons.
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In a metallic crystal the