Q&S related to electronic structure of materials lecture Submit your answers electronically before September 14, 12am. 1) Silicon (Si) and Chlorine (Cl) react with each other. a) What is the chemical formula of the reaction product (0.25p)? Silicon is group 4 element and will exhibit, like carbon, sp3 hybridization involving 4 sp3 orbitals at bond angle of 109o. Unlike carbon, silicon cannot make double and triple bonds b) Based on this describe the geometric arrangement of atoms in a reaction product between Si and Cl (0.25p). c) do you expect the product to be solid, liquid or a gas at room temperature (0.5 p)? Motivate your answers. 2) A pure crystalline material (no impurities present) appears red in transmitted light. a) Explain if this material is a metal, semiconductor or insulator (0.5p), b) What is an approximate energy band gap of this material (in eV) (0.5p)?