Carbon
Carbon is a chemical element in periodic table having symbol C and atomic number 6. Non-metallic element, many tetravalen, carbon has some allotropic forms: ▪ Diamonds. Structure: each atoms tetrahedron bound to four others, forming a 3-dimensional atomic network of six square ring experts. ▪ graphite. Structure: each atom is bound to three sides to three other atoms, forming a two-dimensional ring of six members; The sheets are weakly tied together. Used in pencil to mark paper. ▪ fullerene. Structure: comparable large molecules are formed entirely of carbon-triple bonds, forming. ▪ ceraphite. The structure can not be ascertained. ▪ lonsdaleite. Structure: resembles a diamond, but forms a hexagonal crystalline network. ▪ amorphous carbon. Structure: a combination of carbon in non-crystalline, uneven, glassy form. ▪ carbon nanowires. Structure: low density network resembles graphite clusters, where atoms combine in three terms in six and seven experts. ▪ carbon nanotubes.