化学英语课件.ppt

化 学 英 语 补充内容一： 一、Units of measurement and fundamental constants 1. SI base physical quantities and units Physical Unit Name of Unit Quantity abbreviation 二、 Atoms and Element element symbols: one or two letters abbreviations derived from their modern names, or in some cases from their old Latin names. S-block Element IA H: Li: Na: K: Rb: Cs: Fr: P-block Element P-block Element Common Transition Elememt Fe : Mn : Cu: Zn: Hg: Ag: Au: 三、 Speaking of common mathematical symbols R： R： R1： +： -： ?： ?： ?： =： ?： ?： 补充内容二 一、 Speaking of common molecular formulas Na2SO4: Sodium sulphate N-a-two-S-O-four Mg(NO3)2: Magnesium nitrate M-g-N-O-three-taken-twice; M-g-pause-N-O-three-pause-twice [Zn(NH3)4]2+: Ca3(PO4)2 ·2H2O: 二、 Speaking of common equations ?: give, yield, produce, form, become ? : evolved as a gas, give off a gas ? : is precipitated, gives X precipitate : reacts reversibly 二、 Speaking of common equations P4+6Cl2→ 4PCl3 One P4 molecule plus six Cl2 molecules yields four molecules of PCl3. N2(g)+3H2 (g) 2NH3 (g) Gaseous nitrogen reacts with gaseous hydrogen at 400oC and 250atm in the presence of FeO as a catalyst to produce gaseous ammonia. CO32- + Ca2+ ? CaCO3 ? a carbonate anion with a valency of two plus a calcium cation with a valency of two produce a calcium carbonate precipitate. 二、 Speaking of common equations HCl(aq)+NaOH(aq)→NaCl(aq)+H2O(l) hydrochloric acid plus sodium hydroxide in aqueous solution yields sodium chloride plus liquid water. 2HNO3(aq)+Ca(OH)2(aq) →Ca(NO3)2(aq)+2H2O(l) two nitric acid molecules react with one calcium hydroxide molecule in aqueous solution produce one calcium nitrate molecul