Science / Chemistry / Standard Hydrogen Electrode: A platinum electrode that runs the half reaction 2 H+(aq, 1M) + 2 e- rightarrow H2(g, 1 atm), chosen as a reference for cell voltages. The electrode potential of the standard hydrogen electrode is def MORE
Science / Periodic Table of Elements / Rhodium (Rh): Atomic number: 45, Atomic mass: 102.91 g.mol -1, Electronegativity: 2.2, Density: 12.4 g.cm-3 at 20?°C, Melting point: 1970 ?°C, Boiling point: 3727 ?°C, Isotopes: 9, Electronic shell: [ Kr ] 4d8 5 MORE
Science / Periodic Table of Elements / Mercury (Hg): Atomic number: 80, Atomic mass: 200.59 g.mol -1, Electronegativity: 1.9, Density: 13.6 g.cm-3 at 20?°C, Melting point: - 38.9 ?°C, Boiling point: 356.6 ?°C, Vanderwaals radius: 0.157 nm, Ionic radi MORE
Science / Periodic Table of Elements / Iridium (Ir): Atomic number: 77, Atomic mass: 192.2 g.mol -1, Electronegativity: 2.2, Density: 22.4 g.cm-3 at 20?°C, Melting point: 2450 ?°C, Boiling point: 4527 ?°C, Vanderwaals radius: 0.126 nm, Ionic radius: MORE
Science / Periodic Table of Elements / Tungsten (W): Atomic number: 74, Atomic mass: 183.85 g.mol -1, Electronegativity accoridin to Pauling: 1.7, Density: 19.3 g.cm-3 at 20?°C, Melting point: 3410 ?°C, Boiling point: 5660 ?°C, Vanderwaals radius: 0. MORE
Science / Periodic Table of Elements / Barium (Ba): Atomic number: 56, Atomic mass: 137.33 g.mol -1, Electronegativity: 0.9, Density: 3.5 g.cm-3 at 20?°C, Melting point: 725 ?°C, Boiling point: 1640 ?°C, Vanderwaals radius: 0.222 nm, Ionic radius: 0 MORE