The Element Hydrogen

This is the element which is most abundant of the chemical elements that can be found anywhere in the universe since 75% of universe’s elemental mass is consist of hydrogen. Although elemental hydrogen is rare on Earth, hydrogen is industrially produced from hydrocarbons. Hydrogen can be produced from water, since water has two hydrogen atoms attached to an oxygen atom – H2O, however, it is an expensive process compared to the former method.

When mixed with oxygen, hydrogen explodes upon ignition. Oxygen-hydrogen flame burns in ultraviolet color range and is nearly visible to the naked eye. The explosion of Hindenburg airship is one of the incidents which show the dark side of hydrogen if not used carefully.

 


Atomic Number & Chemical Properties


Element Basics:

Chemical Symbol: H
Atomic Number: 1
Atomic Weight: 1.00794
Element Classification: Non-Metal
Discovered By: Henry Cavendish
Date of Discovery: 1766 (England)
Origin of Name: Greek: hydro (water) and genes (generate)

How to Recognize it at a Party:

Colorless, odorless, tasteless gas

Seriously Atomic Information:

Density (g/cc): 0.0708 (@ -253°C)
Melting Point (°K): 14.01
Boiling Point (°K): 20.28
Atomic Radius (pm): 79
Atomic Volume (cc/mol): 14.1
Covalent Radius (pm): 32
Ionic Radius: 154 (-1e)
Pauling Negativity Number: 2.20
First Ionizing Energy (kJ/mol): 1311.3
Oxidation States: 1, -1
Electronic Configuration: 1s1

Getting Intimate with Hydrogen:

Lattice Structure: Hexagonal (HEX)
Lattice Constant (Å): 3.750
Lattice C/A Ratio: 1.731
Specific Heat (@20°C J/g mol): 14.267 (H-H)
Fusion Heat (kJ/mol): 0.117 (H-H)
Evaporation Heat (kJ/mol): 0.904 (H-H)
Thermal Conductivity (@25°C W/m K):
Debye Temperature (°K): 110.00


Society's Questions About Hydrogen:

Have you ever wondered what everyone else in the world thinks about Hydrogen? Is anyone else looking for it too? If so, why? What do they want?

The following list shows the most common online questions about the element Hydrogen. Are your questions the same or different from everyone else's?

Top Hydrogen Topics:

  • hydrogen 2710
  • hydrogen peroxide 1335
  • hydrogen bomb 596
  • hydrogen generator 511
  • hydrogen fuel cell 430
  • hydrogen cars 409
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