化学文本文档（Chemical text document）.doc

化学文本文档（Chemical text document） A molecule must be a molecular crystal Molecular crystal: a crystal formed through intermolecular interactions. For example: all non-metallic hydrides, most of the non-metallic oxide, most of the covalent compounds, a few salt (such as AlCl3). For example: H2 (hydrogen), N2 (nitrogen), O2 (oxygen) CO2 (carbon dioxide), H2S (hydrogen sulfide) and HCl (hydrochloric acid), HN3 (ammonia) SO2 (sulfur dioxide), H2O (water), CS2, carbon disulfide, HCN (hydrocyanic acid), HF (hydrogen fluoride), CO (CO), gets (hydrogen bromide), HI (hydrogen iodide), there are numerous types of organic matter: CH4 (methane), C2H6 (ethane), C6H6 (benzene), C2H5OH, alcohol (ethanol), CH3COOH (acetic acid, acetic acid), CH3CHO (acetaldehyde), and so on and so on 2. There are three atoms of the material directly: 1 is a rare gas, helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Rn) 2 (Xe), radon is atomic crystal, diamond (C), silica (SiO2), silicon carbide (SiC), elemental silicon (Si), there is a crystal boron (B), silicon nitride (Si3N4), carbon nitride (C3N4) 3 is a metal simple substance, they are composed of metal atoms, lead (Pb), cadmium (Cd), mercury (Hg), Cu (copper), Na (sodium), K (K), Ca (Ca), Mg (magnesium), Rb (Rb), Cs (cesium), Fe (iron), zinc (Zn), Ag (silver), Au (gold), Mn (Mn) The substance of ions is ionic crystals Alkali NaOH (sodium hydroxide), KOH (potassium hydroxide), active metal oxide Na2O (sodium oxide), MgO style (magnesium), Na2O2 (sodium), CuSO4 (copper), NaCl (sodium chloride), Na2CO3 (sodium carbonate), most of the salts (BeCl2, AlCl3, except Pb (Ac) 2, etc). Details on ionic crystals: 6/wjm/hxjxzyk/jiaoan/g31jtjg.htm Silicon gu (Taiwan, Hong Kong) is a chemical element whose chemical symbol is Si and used as silicon. Atomic number 14, relative atomic mass 28.09, there are amorphous silicon and crystalline silicon two different forms, belonging to the elements of the IVA family on the periodic table. Silicon is one of the