Pencil lead is a compound
yes
yes it is
No. Also, "pencil lead" is not lead; it is almost always graphite (made of carbon)
yes yes it is
the point, I think, is either the amount of different substances in the graphite/lead, or even the type of eraser...
There are a lot of advantages to pencils. They don't dry up like pens, for one. They're also eraseable and allow for shading. Thinking more abstractly, they are a direct reflection of how much work you've done with themβthe shorter the pencil (or the inner lead in a mechanical pencil), the more work you've done. There are disadvantages, too. They are in constant need of maintenence (sharpeners, extra pieces of lead, etc.) and tend to smudge as you run your hands across their markings.
what is a qualitative example of a pencil
Yes they are waterproof.
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
The lead pencil was invented on 1564.
Pencil lead is a conductor.