A solid element X has four elecrtrons in the outermost shell of its tom .An allotrope Y of this element is used as a dry lubricant in machinery and also in making pencil leads .
(a) What is element X?
(b) Name the allotrope Y.
(c ) State whether allotrope Y is a good conductor or non- conductor of electricty .
(d) Name one use of allotrope Y (opther than lubrication and pencil leads)
(e) Name two other allotropes of element X.

Answer

(a) carbon,(b)Graphite,(c ) Good conducctor of electricity ,(d) Electrodes ,(e ) Diamond and Buckminstrerfullerence