Pure
Leed
The grey or black core of a pencil is made of graphite which is a form (known as an allotrope) of the element carbon. To vary the hardness of the 'lead' in the pencil the graphite may be mixed with clay or some other substances.
Yes it is, because you could see more than one substance in it. Wood and The led. and of course the led and wood could be separated. So the pencil would be considered as mechanical mixture
Soot. This includes a flammable substance called creosote.
no it is non pure substance
Pure
Its a mixture
On April 15, 1770, JosephPriestley described a vegetable gum which had the ability to rub out pencil marks: "I have seen a substance excellently adapted to the purpose of wiping from paper the mark of black lead pencil." He dubbed the substance rubberOther information here - http://en.wikipedia.org/wiki/Eraser
Its a mixture
Hard Black pencil.
An HB pencil is just a No. 2 Pencil HB stands for Hard Black
No, sadly you can't if you absolutely have to than make the black pencil wet very wet
The main body of the pencil is made from soft wood which is naturally boyant, the pencil 'lead' is not lead at all but a much lighter substance called graphite. Your pencil is just not heavy enough to sink.
It is a pencil, painted black, made by Papermate.
A double sided pencil with black and red color, preferred by auditors.
The black stuff in the middle of the pencil is a mixture of graphite (an element that is mined) and clay.