They are all comprised (or made up of) carbon.
Carbon Dioxide
Coal, pencil lead, and diamonds all contain carbon.
both a diamond and a lump of coal are primarily composed of the element Carbon (C)
Pencil lead does not have coal. Pencil lead contains graphite.
Diamond, coal, graphite, coke and buckminsterfullerene are composed primarily of carbon and are insoluble in water.
Yes. Other allotropes include coal and graphite, such as you might find in a pencil as 'lead'.
No. coal is coal and diamond is diamond. They are both formed from carbon, but diamond is much harder than coal.
Yes, either as Diamond (the jewel) Coal (the fossil fuel) or Graphite (the grey thing inside your pencil).
coal+wood=pencil
coal+wood=pencil
Graphite is used to make pencil lead, but it is not a form of coal.
They both are in the under ground Made by earth and by magma under ground weather and erosion Was how it forms under ground 12345 Easy as that