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NielI have never heard of a semi-metal. My limited knowledge of the Periodic Table of the Elements does not recall such a thing. Please name one.
But, what is Semi-Metal ?
For those people who hate wiki I will give a brief idea of what a semi-metal is. I seem to remember colouring in a periodic table with metals on the left and non-matals in the upper right hand corner. Inbetween metals and non-metals there are some elements that display some properties of each. If you draw a diagonal line down from Boron you will go through the metalliods or semi-metals. Examples of which are Boron, Silicon, Germanium, Arsenic, Antimony and so on. Even some of the elements off this diagonal have allotropes; one of which is more metal like than the other. For example Diamond (non-metal) and the slightly conductive, slippy slidey graphite with its very open structure.I luff metals too but non-metals are cute too. I still luff mercury best though so prrrrf to you all.