what is the difference between a dimond and pencil lead and graphite?
396032
Firstly, pencil lead IS graphite.  O.k, back to your question.  Both graphite and diamond are allotropic forms of carbon- they differ in the spatial arrangement of their molecules a lattice.  In diamond, the carbon atoms are arranged in a regular tetrahedral spatial arrangement, while in graphite, the carbons are arranged in an irregular "stacked" manner.  This structural difference results in different properties of hardness.  Diamond is the hardest substance known, with a Moh's scale reading of 10, while graphite is very soft and has a rating of approximately 1.
564883
pencils they're more soft
973382
Lucky you, you just stuck yourself with graphite, not lead.  Hurtz, donut?
466214
a chromotagraphy is intended to split up artificial color into its subparts. if you use a ball point pen, the ink will also be separated. that is why you use a pencil instead. lead cannot be broken up into further pigments.
984300
i dont know if a mole is the HEART of chemistry, but it is important for relating things from the molecular level to the measureable level\n\na pencil is not just one element, it is usually made of wood, metal, rubber, and graphite \n\nif you were asking what is the graphite (commonly called lead) is made of, it is carbon.  atoms of carbon make up molecules of graphite
426121
In Rome, scribes wrote on papyrus (an early form of paper) with a thin metal rod called a stylus, which left a light but readable mark. Other early styluses were made of lead. Today we still call the core of a pencil the "lead" even though it is made from nontoxic graphite.  (Lead is toxic and leaches right through your skin, so it's not a great choice for a writing implement!)\n\nGraphite came into widespread use following the discovery of a large graphite deposit in Borrowdale, England in 1564. Graphite left a darker mark than lead, but was so soft and brittle that it required a holder. At first, sticks of graphite were wrapped in string. Later, the graphite was inserted into wooden sticks that had been hollowed-out by hand! The wood-cased pencil was born.
1155836
well, pencils aren't made with REAL lead anymore...but eating graphite is probably not the best thing either. that said, i used to when i was in the 3rd grade & im ok..
851017
B)   PbS  use the solubility rules. all leads are insoluble except with NO3, ClO4, and SO4....there is a list of solubility rules.
18116
Pencils are made industrially by mixing finely ground graphite and clay powders, adding water, forming long spaghetti-like strings, and firing them in a kiln. The resulting strings are dipped in oil or molten wax which seeps into the tiny holes of the material, resulting in smoother writing. A juniper or incense-cedar plank with several long parallel grooves is cut to make something called a slat, and the graphite/clay strings are inserted into the grooves. Another grooved plank is glued on top, and the whole thing is then cut into individual pencils, which are then varnished or painted.\n\nMany pencils, particularly those used by artists, are labelled on the European system using a scale from "H" (for hardness) to "B" (for blackness), as well as "F" (for fine point). The standard writing pencil is "HB". However, artist's pencils can vary widely in order to provide a range of marks for different visual effects on the page. A set of art pencils ranging from a very hard, light-marking pencil to a very soft, black-marking pencil usually ranges from hardest to softest as follows:\n\n9H 8H 7H 6H 5H 4H 3H 2H H F HB B 2B 3B 4B 5B 6B 7B 8B 9B \n\nThis translates between American and European ranges thusly:\n\nU.S.      Europe\n#1     =     B\n#2     =    HB   (most common)\n#2 1/2 =     F   (also seen as 2 4/8, 2.5, 2 5/10,   due to patent issues)\n#3     =     H\n#4     =    2H\n\nSo, as you see, the #2 pencil is used because it is a "lead" density that isn't too hard or too soft for writing in standard writing use.\n\nI am an artist and use all of these various types of pencils.  \n\nBTW, there is no actual Lead in pencils.  That is a myth.
203972
I've done some research on this because I seem to remember my teacher talking in school about how they can make batteries with graphite (pencil lead) and vinegar that put out more energy and are more environmentally safe than regular batteries. I'm not sure how this happens but I know that you can take vinegar and pour some into powdered graphite, rub it into a block of wood, and when the vinegar dries the wood will be extra strong because the vinegar disolves the graphite long enough for it to bind to the wood. I can't find any research or projects to back this up but that is what I remember on the subject. Perhaps you could split a pencil and drop the lead in for a few days and see? Maybe use two and a nine volt battery and see what a current does to affect the chemical process...I wish I could help you more.
952538
Yes, you can use it... the HB 2 is the key.... that is telling you the hardness of the graphite and a #2 = HB2.\n\nGood luck on your test!!!!
34469
Pencils contain graphite, so no.
424025
burton or kemper. thats all i ever use, and have been using for years. they both have some pretty mellow graphics, not super flashy. i she a beginner or advanced? fiberglass cores are nice. woodcores get waterlogged. metal edged to great turns!
98419
I would use Carbon-Graphite electrodes for both the anode (+) and cathode (-) simply because they are cheap and effective.  The electrode you really need to be concerning yourself with is the anode since it is most prone to corrosion, you have much more freedom with the cathode.  I really dont see the need of using an expensive inert metal electrode, when graphite will do the job.
586825
Of course, "lead" pencils contain no lead although they are named for early writing devices that did use lead.  The modern wooden pencil uses a mixture of graphite and clay (the more clay the harder the ... ooops lead).  See the link for details.
1168987
graphite and diamond are allotropes of carbon.This is one of the unique properties of carbon.
487743
http://en.wikipedia.org/wiki/Pencil\n\nfind the answer in there ...