Catalyst

Science / Chemistry / Catalyst: A substance that increases the rate of a chemical reaction, without being consumed or produced by the reaction. Catalysts speed both the forward and reverse reactions, without changing the position of equilibrium. Enzymes are catalysts for many biochemical reactions.

Mercury (Hg)

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 radius: MORE

Rhodium (Rh)

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 5s1, MORE

Vanadium (V)

Science / Periodic Table of Elements / Vanadium (V): Atomic number: 23, Atomic mass: 50.9414 g.mol -1, Electronegativity: 1.6, Density: 6.1 g.cm-3 at 20°C, Melting point: 1910 °C, Boiling point: 3407 °C, Vanderwaals radius: 0.134 nm, Ionic radius: 0. MORE

Iridium (Ir)

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: 0.0 MORE

Bismuth (Bi)

Science / Periodic Table of Elements / Bismuth (Bi): Atomic number: 83, Atomic mass: 208.9804 g.mol -1, Electronegativity: 1.9, Density: 9.80 g.cm-3 at 20°C, Melting point: 271 °C, Boiling point: 1420 °C, Vanderwaals radius: 0.152 nm, Ionic radius: 0 MORE

Platinum (Pt)

Science / Periodic Table of Elements / Platinum (Pt): Atomic number: 78, Atomic mass: 195.09 g.mol -1, Electronegativity: 2.2, Density: 21.4 g.cm-3 at 20°C, Melting point: 1772 °C, Boiling point: 3800 °C, Vanderwaals radius: 0.138 nm, Ionic radius: 0. MORE

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