Hydrogen - Wikipedia
WebMelting point (H 2) 13.99 K (−259.16 °C, −434.49 °F) Boiling point (H 2) 20.271 K (−252.879 °C, −423.182 °F) Density (at STP) 0.08988 g/L: when liquid (at m.p.) 0.07 g/cm 3 (solid: 0.0763 g/cm 3) when liquid (at b.p.) 0.07099 g/cm 3 : Triple point: 13.8033 K, 7.041 kPa : Critical point: 32.938 K, 1.2858 MPa
Hydrogen - Element information, properties and uses | Periodic …
WebMelting point: −259.16°C, −434.49°F, 13.99 K Period 1 Boiling point: −252.879°C, −423.182°F, 20.271 K Block: s Density (g cm −3) 0.000082 Atomic number
Hydrogen | Properties, Uses, & Facts | Britannica
WebMay 5, 2024 · The two forms of hydrogen have slightly different physical properties. The melting point of para-hydrogen is 0.10° lower than that of a 3:1 mixture of ortho-hydrogen and para-hydrogen.
Hydrogen - Thermophysical Properties - The Engineering ToolBox
WebBoiling Point - saturation pressure 14.7 psia and 760 mm Hg - ( o F, o K )-423, 20.4: Latent Heat of Evaporation at boiling point ( Btu/lb, J/kg ) 192, 447000: Freezing or Melting Point at 1 atm ( o F, o C )-434.6, -259.1: Latent Heat of Fusion ( Btu/lb, J/kg ) 25.0, 58000: Critical Temperature ( o F, o C )-399.8, -240.0: Critical Pressure ...
Hydrogen - Melting Point - Periodic Table of Elements
WebNov 17, 2020 · Melting point of Hydrogen is -259.1°C. Note that, these points are associated with the standard atmospheric pressure. In general, melting is a phase change of a substance from the solid to the liquid phase. The melting point of a substance is the temperature at which this phase change occurs.
Hydrogen Facts - H or Atomic Number 1 - ThoughtCo
WebSep 19, 2018 · Atomic Number: 1. Group: Group 1. Classification: Nonmetal. Block: s-block. Electron Configuration: 1s1. Phase at STP: Gas. Melting Point: 13.99 K (−259.16 °C, −434.49 °F) Boiling Point: 20.271 K (−252.879 °C, −423.182 °F) Density at STP: 0.08988 g/L. Oxidation States: -1, +1. Electronegativity (Pauling Scale): 2.20.
20.3: The Chemistry of Hydrogen - Chemistry LibreTexts
Web20.3: The Chemistry of Hydrogen. Page ID. Anonymous. LibreTexts. Learning Objectives. To describe the physical and chemical properties of hydrogen and predict its reactivity.
Hydrogen (H) - Periodic Table
WebHydrogen is the 1st element in the periodic table and has a symbol of H and atomic number of 1. It has an atomic weight of 1.008 and a mass number of 1. ... Melting Point: 13.99 K. Critical Pressure: 1.2858 MPa. Critical Temperature: 32.938 K. Triple Point: 13.8033 K. 7.041 kPa. Visual; Hydrogen is a Colorless. H has a CPK of #ffffff, Jmol of # ...
Technical data for the element Hydrogen in the Periodic Table
WebHydrogen: Symbol: H: Atomic Number: 1: Atomic Weight: 1.008: Density: 0.0899 g/l: Melting Point-259.14 °C: Boiling Point-252.87 °C: Thermal properties: Phase: Gas: Melting Point-259.14 °C: Boiling Point-252.87 °C: Absolute Melting Point: 14.01 K: Absolute Boiling Point: 20.28 K: Critical Pressure: 1.293 MPa (12.76 Atm) Critical Temperature ...
Hydrogen - Chemistry Encyclopedia - reaction, water, metal, gas, …
WebMELTING POINT: −259.14°C. BOILING POINT: −252.87°C. DENSITY: 0.08988 g/L. MOST COMMON IONS: H + , H −. Hydrogen was first recognized as a gaseous substance in 1766 by English chemist and physicist Henry Cavendish. The abundance of hydrogen in Earth's crust is 1,520 parts per million.
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