The lead pencil was invented on 1564.
lead pen because a lead pencil is a regular pencil.
lead pencil is incorrect because it lead pencil
there is no lead in lead pencil.
No. Lead is a realtively good conductor. The insulator is the wood on the outside of the lead.
No. Also, "pencil lead" is not lead; it is almost always graphite (made of carbon)
It was invented by N.J Conte in 1795.
In 1567
so that people could write
lead pen because a lead pencil is a regular pencil.
Pencil lead does not have coal. Pencil lead contains graphite.
lead pencil is incorrect because it lead pencil
there is no lead in lead pencil.
There is no lead in pencil - Pencil is made from graphite
Pencil lead is a compound
Pencil lead isn't really lead, it is graphite, a form of carbon. Pencil lead doesn't have any lead in it whatsoever.
The formula for pencil lead is c3,h2o
we get lead of pencil from the mixture of clay and graphite