As we all know, is a toxic metal lead, then the pencil will also toxic it?

In actual fact, the main component of pencil refills are graphite and clay, graphi　　te flake of metallic solids, which are carbon - van der Waals forces between the carbon carbon bond, the layers - carbon bonds are very stable, want to destroy is very difficult, which is why diamond and graphite are composed of carbon, but the physical properties and the price difference is big, nothing can destroy the body of carbon - carbon bonds, so be sure that pencil is safe.