Why is graphite used to make pencil lead?

Question

pls answer it with reference to the different arrangements of atoms in this allotrope of carbon =)

Answer 1

The graphit is an allotropic form of carbon that consists of atoms of carbon that possesses a kind of hybridization in a way that three strong bonds are forming a equilater triangle in the same plane and a weaker bond perpendicular to that plane.

This allows that carbon arranges in parallel "sheets" that slide one each other giving the graphit a high lubricant performance.

That is the reason that is used in lead pencils: each graphite sheet slides on the paper surface when we write on it, leaving carbon atoms adhered on it. We saw the result as writing characters.

Good luck!

Answer 2

Is Graphite Used In Pencils

Answer 3

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Actually no - they didn't contain lead, but people thought that the graphite in them was a kind of lead. This is from Wikipedia: Some time before 1565 (some sources say as early as 1500), an enormous deposit of graphite was discovered on the approach to Grey Knotts from the hamlet of Seathwaite in Borrowdale parish, Cumbria, England. The locals found that it was very useful for marking sheep. This particular deposit of graphite was extremely pure and solid, and it could easily be sawn into sticks. This remains the only large scale deposit of graphite ever found in this solid form. Chemistry was in its infancy and the substance was thought to be a form of lead. Consequently, it was called plumbago (Latin for "lead ore"). The black core of pencils is still referred to as lead, even though it never contained the element lead. The words for pencil in German (Bleistift), Irish (Peann Luaidhe), Arabic (قلم رصاص qalam ruṣāṣ), and other languages literally mean lead pen.

Answer 4

Graphite 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.

Answer 5

Graphite is used now, not only because it makes a darker color when written with it, but also because lead poisoning was occuring too often in schools. Accidentally puncturing urself with a lead pencil can cause lead poisoning. Some with serious side affects. So the lead alternative was graphite.

Answer 6

The structure of the electronic energy bands and Brillouin zones for graphite is developed using the "tight binding" approximation. Graphite is found to be a semi-conductor with zero activation energy, i.e., there are no free electrons at zero temperature, but they are created at higher temperatures by excitation to a band contiguous to the highest one which is normally filled. The electrical conductivity is treated with assumptions about the mean free path. It is found to be about 100 times as great parallel to as across crystal planes. A large and anisotropic diamagnetic susceptibility is predicted for the conduction electrons; this is greatest for fields across the layers. The volume optical absorption is accounted for.

Answer 7

graphite is not to make pencil lead....graphite is structure by fibre of cabon which is strong and lighter than metal...golf stick....pencil lead is structure by layer of carbon which is soft, easy for you to take it away layer by layer, when you write it on paper, meanning you take layer by layer.