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Compare the properties of beryllium with the other elements in the same group.

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Beryllium:

  • Forms covalent compounds. 
  • High melting and boiling point. 
  • Does not react with water even at elevated temperature. 
  • Does not combine directly with hydrogen. 
  • Halides are covalent. 
  • Hydroxides and oxides of beryllium are amphoteric in nature.
  • It is not readily attacked by acids because of the presence of an oxide film.
  • Beryllium carbide evolves methane withwater.
  • Salts of Be are extensively hydrolyzed.
  • It has no vacant ‘d’ orbitals in the outermost shell.

Other elements of the family:

  • Forms ionic compounds.
  • Lower melting and boiling point.
  • React with water.
  • Combine directly with hydrogen.
  • Halides are ionic or electrovalent.
  • Hydroxides and oxides are basic in nature.
  • Readily attacked by acids.
  • Other carbides evolves acetylene with water.
  • Hydrolyzed.
  • They have vacant ‘d’ orbitais in the outermost shell.

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