lead is the most normal
It writes like a reagular pencil but when it runs out of lead you press the eraser and more lead comes out. When its out of lead you go buy more depending on the type of mechanical pencil:)
No, it is a mixture of Graphite (a form of Carbon) and clay.
Yes!!!
the .7 has nothing to do with the hardness of the lead. The number is the diameter of the piece of lead.
Not all mechanical pencils have 2B or B lead. Some pencils have bigger lead.
There is not an element by that name.
Mechanical pencils themselves do not need any energy in the forms of battery or electricity. However, mechanical pencils do need human energy to work. We need to add lead and push lead out; they do not do this on their own.
Due to the fact that most pencil lead is graphite, you can't get lead poisoning. :)
None: The=Pronoun Mechanical=Adjective Pencil=Noun [Has no more]=Not a verb, it's a prefix or something like that. Lead=Noun.
Mechanical pencils, like the regular kind of pencils, use graphite.
A o.7 mechanical pencil will do the job.