Image Hydrazine molecule

TLF ID R6849

This is a colour image of a model of a molecule of hydrazine, N₂H₄. In this model, atoms are represented by coloured spheres held together by grey rods, representing covalent bonds. The hydrazine molecule consists of two nitrogen atoms (the blue spheres) and four hydrogen atoms (the grey-white spheres).



Educational details

Educational value
  • Hydrazine is a toxic, colourless liquid with an ammonia-like odour. It does not occur naturally, but is widely used in chemical industries, and is often used as a rocket fuel.
  • The atoms in the hydrazine molecule are connected by single covalent bonds. A covalent bond is formed when atoms share electrons. A single covalent has two shared electrons, one contributed by each atom. Because the nitrogen atom is able to contribute three electrons, it is able to participate in three covalent bonds, whereas each hydrogen atom has only one electron to share and so can form only one bond.
  • The single bond between the nitrogen atoms allows rotation of hydrogen atoms to occur and the shape of the molecule can vary slightly as a result.
  • The type of model shown here, called a ball-and-stick model, is one of several ways of modelling molecules. This type is useful because it clearly shows the geometry of the molecule and the order (single, double or triple) of the bonds. However, because 'sticks' are used to represent bonds, this type of model does not represent the actual shape of the molecule as well as 'space-filling' models do.
Year level

7; 8; 9; 10; 11; 12

Learning area
  • science
Strand
  • Science/Science understanding

    Other details

    Contributors
    • Publisher
    • Date of contribution: 20 Sep 2013
    • Organisation: Education Services Australia
    • Address: Melbourne VIC 3000 Australia
    • URL: http://www.esa.edu.au/
    • Copyright holder
    • Organisation: Education Services Australia
    • Address: Melbourne VIC 3000 Australia
    • URL: http://www.esa.edu.au/
    • Remarks: Copyright Education Services Australia Ltd
    • Author
    • Date of contribution: 2006
    • Organisation: Education Services Australia
    • Address: Melbourne VIC 3000 Australia
    • URL: http://www.esa.edu.au/
    • Remarks: creator
    • Content provider
    • Organisation: Education Services Australia
    • Address: Melbourne VIC 3000 Australia
    • URL: http://www.esa.edu.au/
    Access profile
    • Device independence
    • Hearing independence
    Learning resource type
    • Image
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    Rights
    • © Education Services Australia Ltd, 2013, except where indicated under Acknowledgments