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Top: Kids_and_Teens: School_Time: Science: Chemistry: Elements: Nitrogen
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This category contains sites about the element Nitrogen.
All sites submitted to this category should be of interest to and appropriate for children under the age of 18. Please remember that no site is guaranteed placement in the Kids and Teens section of the Open Directory. Sites that are primarily designed to sell products or services will not be listed in any branch of Kids and Teens. |
Nitrogen was discovered in 1772 by Daniel Rutherford. Nitrogen makes up 78% of the Earth's air. Nitrogen is found in all living systems as a component of biological compounds.
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