General | States | Energies | Oxidation & Electrons |Appearance & Characteristics
Reactions | Other Forms |Radius | Conductivity | Abundance
Encyclopedia Britannica articles


Name Nitrogen Symbol N
atomic number 7 Atomic weight 14.0067
Density @ 293 K 0.0012506 g/cm3 Atomic volume 17.3 cm3/mol
Group Non-Metal discovered 1772


state (s, l, g) g
melting point 63.34 K boiling point 77.4 K
Heat of fusion 0.3604 kJ/mol Heat of vaporization 2.7928 kJ/mol
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1st ionization energy 1402.3 kJ/mole electronegativity 3.04
2nd ionization energy 2856 kJ/mole electron affinity -6.75 kJ/mole
3rd ionization energy 4578 kJ/mole Specific heat 1.04 J/gK
heat atomization 473 kJ/mole atoms

Oxidation & Electrons

Shells 2,5 electron configuration [He] 2s2 2p3
minimum oxidation number -3 maximum oxidation number 5
min. common oxidation no. -3 max. common oxidation no. 5
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Appearance & Characteristics

structure color colorless
uses fertilizer, cryogenics toxicity no
hardness mohs characteristics diatomic(N2)


reaction with air none reaction with 6M HCl none
reaction with 6M HCl none reaction with 15M HNO3 none
reaction with 6M NaOH none
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Other Forms

number of isotopes 2 hydride(s) NH3 N2H4 HN3
oxide(s) N2O NO NO2 N2O5 chloride(s) NCl3


ionic radius (2- ion) pm ionic radius (1- ion) pm
atomic radius 70 pm ionic radius (1+ ion) pm
ionic radius (2+ ion) pm ionic radius (3+ ion) 30 pm
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thermal conductivity 0.03 J/m-sec-deg electrical conductivity 0 1/mohm-cm
polarizability 1.1 A^3


source Air rel. abund. solar system 6.496 log
abundance earth's crust 1.3 log cost, pure 0.4 $/100g
cost, bulk $/100g
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World Wide Web presentation of Chemicool Periodic Table is © Copyright 1996-99 by David D. Hsu. Some data were provided by and used with the permission of JCE Software and is owned and copyright by the Division of Chemical Education, Inc. Additional data were provided by Perkin-Elmer through Peter Lykos of IIT. The information may not be redistributed without the permission of David Hsu or JCE Software.