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metls have conductance and valence band overlap each other..but not in metalloids
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Matelloids- semiconductor of electricity Metal- good conductor of electricity
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Metalloids are intermediate between metals and non-metals.Metalloids are semi-conductors (like silicon) while metals are good conductors of electricity.Metalloids may or may not have lustre, but all metals have lustre (shine)Malleability in metalloids is quite less than metals 

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Metalloids have properties in between those of the metals and non-metals and are semiconductors (whereas metals are conductors and nonmetals are not conductors) and used extensively in circuitry (like computer chips). They are all solids at room temperature, not quite as malleable as metals....but not quite as brittle as nonmetals. They can be shiny (have luster) or not whereas all metal are shiny.

Answer

Metalloids are intermediate between metals and non-metals.

Metalloids are semi-conductors (like silicon) while metals are good conductors of electricity.

Metalloids may or may not have lustre, but all metals have lustre (shine)

Malleability in metalloids is quite less than metals 

Examples of matalloids - silicon, germanium, arsenic, antimony, tellurium, polonium etc.

Examples of metals - iron, silver, gold, copper, aluminium, tin etc.

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