graphite
13 Oct 2014
Pencil erasers and pencil marks
The dark black thing that you see inside the pencils is graphite. Graphite is one of the forms of the element carbon. Wood is the protective outer covering surrounding the graphite lead so that it doesn’t break easily. Pencil lead is made of a combination of finely ground graphite and clay. The mixture is then
19 Aug 2014
Carbon-Different forms of existence
Carbon is the sixth most abundant element in the earth. The property of an element to take more than one physical form is called allotropy and the different forms are called allotropes. As allotropes take different chemical structures, they exhibit different properties as well. Carbon exists in three basic forms in nature – diamond, graphite