Silicon, Si
Silicon is a semiconductor in group IVA of the periodic table with atomic number 14, an atomic weight of 28.086, and a density of 2.33 Mg/m3. It melts at 1410 C.

The electronic configuration of the silicon atom is: (Ne)(3s)2(3p)2, and the atomic radius is 0.132 nm.

Silicon has the diamond cubic crystal structure with a lattice parameter of 0.543 nm. The nearest neighbor distance is 0.235 nm. The diamond cubic crystal structure has an fcc lattice with a basis of two silicon atoms.