why mettaloids are called semi metals
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Metalloids are sometimes called semimetals, a practice that has been discouraged, as the term semimetal has a different meaning in physics than in chemistry. In physics, it refers to a specific kind of electronic band structure of a substance. In this context, only arsenic and antimony are semimetals, and commonly recognised as metalloids.
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The metalloids or semimetals are elements with properties intermediate between the metals and nonmetals. As a group, metalloids have at least one shiny, metallic-looking allotrope. While metalloids are neither good electrical nor thermal conductors, they make excellent semiconductors and form amphoteric oxides.
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