What chemical substance do a diamond, a pencil and charcoal all have in common?
544684
They are all different variations (or allotropes) of carbon.\n\nA diamond is carbon that has been "hardened" and crystalized by intense pressure and heat.\n\nA pencil uses "lead" that is really graphite (carbon arrayed in a different molecular pattern) mixed with different clays.\n\nCharcoal is 85-98% carbon.
472906
Carbon. A diamond is carbon put under a lot of pressure. And haven't you ever heard of somebody drawing with "opaper and carbons"?
403742
Yes, it was Konrad Gesner.\n\nIt dates (we think) to 1565, when Konrad von Gesner, a Swiss-German naturalist, devised a wooden container filled with graphite for the purpose of drawing and writing. Refined, the invention—arguably history's most practically useful communication tool—became universally popular. If you keep a sharpener handy and can avoid breaking the point, you ostensibly can get about 45,000 words or 35 miles of sketched lines from the average pencil.\n\nIncidentally, the common term "lead pencil" is misleading (please excuse the play on spellings). At one time, graphite wrongly was considered to be synonymous with lead.
763705
No, no lead and silicon are elements, not compounds. Neither is made by combining carbon and chlorine. Please do not tell anyone they are, especially someone not very good at chemistry.\n\nCarbon tetrachloride, that's a carbon atom surrounded by four chlorine atoms is a chloride of carbon. It's sort of pyramid shaped. Here's some info on it.
1040516
diamond grit is synthetic diamonds.  they are usually yellow because of the nitrogen that mixes with the carbon in the growth process.  it is hard to grow large synthetic diamonds, so the small ones that are grown are perfect for this substance.  I assume the powder is simply crushed diamond grit.
810136
Werehunt's answer is a bit confusing. It is possible to make real diamonds ( made out of carbon ) in the laboratory, both industrial quality diamonds and gem quality diamonds. \n\nIndustrial quality diamonds are made routinely in factories around the world, These are used in drilling bits and diamond saws etc. \n\nSome, gem quality diamonds have been made in the lab, but this is not done as a matter of routine.\n\nCubic zirconia is not a diamond ( not made of carbon ) but it can be cut and polished to shine like a diamond. \n\nColour in a diamond can be caused by imuprities or by distortions in its internal atomic lattice structure.
457022
I'm pretty sure it is a Diamond. Here's my reasoning:\nDiamonds family name = carbon = black in appearance\n"Give a girl a buck" = Diamonds are a girls best friend\nMany nice colors = Refraction of light through a diamond displays many colors.....
335025
Charcoal...it's black when you buy it..it's red when you use it (burn it) and gray when you throw the old broquets away.
842652
Based on this information, no, a diamond will not spontaneously decompose into graphite. It also does not imply that diamonds will last forever. It only states that diamonds are a better carbon based energy source than graphite.
839318
Hi. Iron, carbon, silicon, copper, oxygen (as part of silicon dioxide), hydrogen (as part of plastic).
766091
Bucky Balls / Fullerenes\n\narchitect Buckminster Fuller\n\ngeodesic dome\n\nEdit: just saw the rest of the question.\n\nI'm not sure for "these molecules are ___ carbon atom molecules." \n\nThe other two kinds of pure carbon are: diamonds and graphite.
15296
Here is the exact answer you need:\n\nOn the basis of their macroscopic properties, it seems impropable that diamonds and graphite are made of exactly the same atoms. This begs the question, how do we know that diamonds are indeed carbon? Surprisingly, this has been known for over 200 years. In 1772 (before the signing of the Declaration of Independence) a talented French chemist, Antoine Lavoisier, burned diamond (ca. 150 milligrams) in a sealed container. Diamonds do not burn readily, so Lavoisier used the high heat provided by a large lens placed in the sunlight. By a simple analysis of the gases produced by burning, Lavoisier determined that the gas we now know as CO2 was produced. Furthermore, the same amount of this gas was produced when 150 milligrams of amorphous carbon in the form of charcoal was burned. Thus, Lavoisier concluded that charcoal and diamond are the same. However Lavoisier was reluctant to publicize such a radical and counterintuitive result. It took more than 20 years before Lavoisier's conclusions were confirmed by Tenant, an English chemist. Let us examine Lavoisier's conclusion in the context of the times. Lavoisier's discovery predated Dalton's formulation that all matter is made of elements by 29 years and Mendeleev's formulation of the periodic table by almost 100 years. Our modern understanding of chemistry allows us to formulate Lavoisier's experiments in a compact way, the chemical equation.\n\n\n\n\n\nThese equations indicate that burning either diamond or graphite causes the bonds of the reactants (the carbon material and dioxygen) to be rearranged to form the product (CO2) and energy in the form of heat. In general, a chemical reaction involves changes in the bonding between atoms in going from reactants to products. Let's contrast these combustion equations with the analogous equation for burning buckyballs.\n\n\n\nNote how the buckyball equation has a subscript of 60 on the carbon, indicating that this form of carbon is molecular. As a result, 60 dioxygen molecules are required to convert the sixty atoms of carbon in each buckyball into 60 molecules of CO2. In a proper, balanced chemical equation the number and types of atoms on the reactant (left) side of the equation equal those on the product (right) side. Because heat is released in this chemical reaction, heat is written as a product. Reactions that generate heat are called exothermic.\n\n\nHope this is enough.
903270
Probably copper, which was one of several elements known to prehistoric man, and can be found in free form.  Carbon, as charcoal, might also qualify.
449195
Carbon, the element, comes in three forms. These are graphite, diamond and the other (non christoline). Each is used in many ways for many things.\n\nGraphite is a flat form of carbon molecule. The cristles are hexagonal. These crystals can slide over each other acting as a lubricant. Graphite is used as a lupricant - often calles "graphite greese". It is also used in "lead" pencils.\n\nTetrahedron crystals are found in diamonds. These are not flat. These are used in jewelery, cutting tools, grinders etc. This is because diamonds are very hard and long lasting.\n\nNon crystaline carbon is used in chamical reactions. Coal is baked in baked in coke ovens to make "coke" (not the drink) which is then used in the manufacture of iron and steel.\n\nCardon is used, by plants, to make sugars, which it turn, we eat to give us energy. As our bodies "burn up" these sugars, we create carbon dioxide which we exhale.\n\nEverywhere you look you see uses of carbon - In timber, carbon fibre, Gasoline the list goes on and on.
243700
Diamond is (under normal pressure) a chemically less stable form of elemental carbon. In order to synthesize diamond, you need to expose carbon to huge amounts of pressure and considerable heat, as can be found under geological conditions.\n\nSynthetical diamonds aren't fakes, btw.
1168987
graphite and diamond are allotropes of carbon.This is one of the unique properties of carbon.
763947
Today's pencils use graphite not lead.  Check your local Staples or other office supply store.