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19 July, 02:40

Which is not a characteristic of metals?

a. Most metal oxides are ionic solids that are basic.

b. They have a shiny luster and various colors, although most are silvery.

c. Solids are malleable and ductile.

d. They are poor conductors of heat and electricity.

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  1. 19 July, 03:24
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    Answer: d: They are poor conductors of heat and electricity.

    Explanation:

    Although is common knowledge that metals are characterized by high electrical conductivity and heat conductivity, these properties can be justified by looking at the metallic bonding.

    In a metal, the bonding electrons are delocalized over the entire crystal. In fact, metal atoms in a crystal can be imagined as an array of positive ions immersed in a sea of delocalized valence electrons. The mobility of the delocalized electrons makes metals good conductors of heat and electricity.
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