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An element occupies group No.14 and period number 2 exists in different allotropic forms. One form of this element has lubricating property (A). Another form is the hardest substance (B). New allotrope of this element is named as `Buckyball' (C) and it is superconducting. Identify the element, (A) (B) and (C).

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An element occupies group No.14 and period number 2 exists in different allotropic forms.

Need to find allotropes of Carbon-

(A). Another form is the hardest substance  - Diamond

(B). New allotrope of this element is named as `Buckyball'  -  Buckminster fullerene 

(C) and it is superconducting -   Graphite

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