Saved Bookmarks
| 1. |
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. |
|
Answer» (a) Element X : Carbon (b) Allotrope Y: Graphite (c) Y is a good conductor of electricity. (d) Y is used for making graphite electrodes or carbon electrodes in dry cells. (e) Allotropes of X: Diamond and buckminsterfullerene |
|