The pencil “lead” is actually a mixture of graphite and clay. More clay in the mixture makes the lead harder. A harder lead has a higher number. Pencils are numbered from 1-3 but most people use a ...

You may recognize graphite as the "lead" in a pencil, but besides helping you take notes or fill in countless bubbles on exam ...

These structural colors form due to a phenomenon known as thin-layer interference between clay and graphite, which are the ...

MIT physicists report the unexpected discovery of electrons forming crystalline structures in a material only billionths of a ...

But wouldn’t it be nice if the graphite tip of a pencil could be turned into diamond? After all, they are both composed entirely of carbon atoms. The main difference between pencil lead and the ...

The Graphite Pencil was discovered before 1565, when a deposit of graphite was discovered near Grey Knotts of Seathwaite in Cumbria, England. The locals being traditional farmers found that it was ...

The “lead” of a pencil is actually made of a substance called graphite which is made of carbon atoms. The picture shows a close-up of one carbon atom. A hydrogen atom has one proton as the nucleus and ...

the Frenchman Nicolas-Jacques Conté pioneered a way of blending graphite and clay into a pencil lead - the birth of the pencils we still use today. History contains many names linked to the ...