The core in pencils is made of graphite. It is a form of carbon where each atom is connected to three others via sp2 covalent bonds to form 'graphene' sheets; these sheets are then connected together by weak bonds (van der Walls forces) and have and interlaminar shear strength of only 34 MPa. Its formula is simply C(s), meaning that it is just elemental carbon in the solid state.
Staedtler Product Information: (composition varies by manufacture)
Pencil Number, Graphite %-wt, Clay %-wt, Wax %-wt
9H 41% 53% 5%
8H 44% 50% 5%
7H 47% 47% 5%
6H 50% 45% 5%
5H 52% 42% 5%
4H 55% 39% 5%
3H 58% 36% 5%
2H 60% 34% 5%
H 63% 31% 5%
F 66% 28% 5%
HB 68% 26% 5%
B 71% 23% 5%
2B 74% 20% 5%
3B 76% 18% 5%
4B 79% 15% 5%
5B 82% 12% 5%
6B 84% 10% 5%
7B 87% 07% 5%
8B 90% 04% 5%
The formula for pencil lead is a combination of graphite mixed with clay. The most common type contains graphite and clay in a ratio of approximately 80:20. The clay acts as a binder to hold the graphite together and determine the hardness of the lead.
The chemical formula for Galema is Lead Sulfide.
The chemical formula of white lead is 2PbCO3 ยท Pb(OH)2.
Formula: Pb2(CO3)4
The chemical formula for lead(II) oxide is PbO.
The chemical symbol for lead (element) is Pb. THe formula is Pb2 Pencil lead however, is a mix of graphite and clay.
Pencil "lead" is not actually lead; it is made from a mineral called graphite. Graphite is a crystalline form of carbon that is naturally occurring and meets the criteria to be classified as a mineral based on its chemical composition and physical properties.
Yes, pencil lead is homogeneous because it is a mixture of graphite and clay that is uniform in composition throughout. This uniformity allows the pencil lead to have consistent writing properties.
The formula for pencil lead is a combination of graphite mixed with clay. The most common type contains graphite and clay in a ratio of approximately 80:20. The clay acts as a binder to hold the graphite together and determine the hardness of the lead.
The chemical formula of lead sulfate is PbSO4.
The chemical formula for lead (II) acetate is Pb(C2H3O2)2.
Because the pencil is made of wood and you only changed the size and shape of the wood or pencil and did not change what the wood is made of the substance
The chemical formula for lead(IV) chloride is PbCl4.
The chemical formula for lead is Pb and for nitrogen is N.
The chemical formula for lead(II) fluoride is PbF2.
The chemical formula of lead(II) phosphate is Pb3(PO4)2.
The chemical formula of lead II chromate is PbCrO4.