the entire kids and teens directory only in Elements/Nitrogen

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See also:

• Kids and Teens: School Time: Science: The Earth: Cycles: Nitrogen (8)

• ChemicalElements.com: Nitrogen [ ] - Features properties, an atomic structure diagram, facts about nitrogen and a table of isotopes.
• Wikipedia: Nitrogen [ ] - Article detailing physical properties, history, applications, characteristics and safety precautions.

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