‘A’ is an element having four electrons in its outermost orbit. An allotropes ‘B’ of this element is used as a dry lubricant in machinery and in pencil leads. So:
i. Write the name of element ‘A’ and its allotropes.
ii. State whether ‘B’ is a good conductor or non-conductor of electricity?
(i) The name of the element 'A' is carbon. The name of its allotrope is graphite.
(ii) The allotrope 'B', i.e. graphite, is a good conductor of electricity.
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