A solid element $X$ has four electrons in the outermost shell of its atom. 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 $Y$ is a good or bad conductor of electricity.
(d) Name one use of $Y$ (other than lubrication and pencil leads)
(e) Name two other allotropes of the element $X$ .

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Solution

(a) Element $X : C a r b o n$
(b) Allotrope $Y : G r a p h i t e$
(c) $Y$ is a good conductor of electricity as its structure contains free electrons which allows for easy conduction of electricity.
(d) $Y$ is used for making electrodes in dry cells.
(e) Allotropes of $X$ : Diamond and Buckminsterfullerene.

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A solid element X has four electrons in the outermost shell of its atom. 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 electricity.
(d) Name one use of allotrope Y (other than lubrication and pencil leads)
(e) Name two other allotropes of element X.

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(f) Which allotrope is used in making the anode of a dry cell?

A

is an element having four electrons in its outermost orbit. An allotrope

B

of this element is used as a dry lubricant in machinery and in pencil leads. So :
(a) Write the name of element

A

and its allotropes.
(b) State whether

B

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Q. An element of group 14 has two common allotropes A and B. A is very hard and is bad conductor of electricity while B is soft . Identify the elements and its allotropes

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(a) Element X:Carbon(b) Allotrope Y:Graphite(c) Y is a good conductor of electricity as its structure contains free electrons which allows for easy conduction of electricity.(d) Y is used for making electrodes in dry cells.(e) Allotropes of X: Diamond and Buckminsterfullerene.