yukta9
The no of electrons present in the valence shell of an atom determine whether it’s a metal ,non-metal or metalloid.If an element has 1,2 or 3 electrons in it’s valence shell it is considered as a metal, if it has 5,6 or 7 electrons it is considered as a non metal and if it has 4 electrons in it’s valence shell then it is considered as a metalloid.Carbon has 4 electrons in it’s valence shell which makes it a metalloid but commonly it is considered as a non metal.
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