Hydrogen

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Hydrogen
Hydrogen A Family Itself

• A Family by Itself

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Hindenberg

• highly flammable diatomic gas (H2). With an
  atomic mass of 1.0094 g/mol, hydrogen is the
  lightest element.
• Hydrogen is the most abundant of the chemical
  elements, constituting roughly 75 of the
  universe's elemental mass.
• Stars in the sky are mainly composed of hydrogen
  in its plasma state.

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• Elemental hydrogen is relatively rare on Earth,
  and is industrially produced from hydrocarbons
  such as methane, after which most elemental
  hydrogen is used "captively" (meaning locally at
  the production site), with the largest markets
  about equally divided between fossil fuel
  upgrading and in ammonia production (mostly for
  the fertilizer market). Hydrogen may be produced
  from water using the process of electrolysis, but
  this process is presently significantly more
  expensive commercially than hydrogen production
  from natural gas.

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Alkali Metals

• The alkali metals are a series of elements
  comprising Group 1 of the periodic table lithium
  (Li), sodium (Na), potassium (K), rubidium
  (Rb),cesium(Cs), and francium (Fr). (Note that
  hydrogen, although nominally also a member of
  Group 1, very rarely exhibits behavior comparable
  to the alkali metals)

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Alkali metals

• The alkali metals are silver-colored (caesium has
  a golden tinge), soft, low-density metals, which
  react readily with halogens to form ionic salts,
  and with water to form strongly alkaline (basic)
  hydroxides
• alkali metals

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