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 position of an element on the periodic table provides information about ... For example, carbon has two main forms - graphite found in pencils, and diamond. Both graphite and diamond have ...

Carbon is in group IV A of the periodic table with atomic number 6, an atomic weight of 12.011, and a density of 2.26. It melts at 3727 C. The stable form of carbon at room temperature is Graphite ...