Science / Periodic Table of Elements / Gold (Au): Atomic number: 79, Atomic mass: 196.9655 g.mol -1, Electronegativity ccording to Pauling: 2.4, Density: 19.3 g.cm-3 at 20?°C, Melting point: 1062 ?°C, Boiling point: 2000 ?°C, Vanderwaals radius: 0 MORE
Science / Periodic Table of Elements / Thallium (Tl): Atomic number: 81, Atomic mass: 204.383 g.mol -1, Electronegativity: 1.8, Density: 11.71 g.cm-3 at 20?°C, Melting point: 304 ?°C, Boiling point: 1473 ?°C, Vanderwaals radius: 0.182 nm, Ionic radius MORE
Science / Chemistry / Back Titration: Determining the concentration of an analyte by reacting it with a known number of moles of excess reagent. The excess reagent is then titrated with a second reagent. The concentration of the analyte i MORE
Science / Chemistry / Theoretical Yield: The amount of product obtained when all of the limiting reagent reacts. MORE