Element: Nitrogen
General data
| Element name | Nitrogen |
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| Chemical symbol | N |
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| Atomic number Z | 7 |
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| Year discovered | 1772 |
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| Standard state (25°C) | Gas |
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| Category | Nonmetal |
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| Block | p |
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| Atomic mass | 14.007 |
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| CPK color | #3050F8 |
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Physical properties
| Melting point | 63.15 K (-210.00 °C) |
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| Boiling point | 77.36 K (-195.79 °C) |
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| Density | 0.0012506 g/cm³ |
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Energy properties
| First ionization energy | 14.534 eV |
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| Electron affinity | no data |
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Atomic structure
| Protons | 7 (Atomic number) |
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| Neutrons (N-14, most abundant isotope) | 7 |
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| Electrons | 7 |
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| Electron configuration | [He] 2s² 2p³ |
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| Oxidation states | +5, +4, +3, +2, +1, -1, -2, -3 |
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| Electronegativity (Pauling) | 3.04 |
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| Atomic radius (van der Waals) | 155 pm |
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Ionization energies - NIST ASD (7 states)
Value type as given by NIST ASD: measured - from evaluated experimental data; calculated - from ab initio calculations (mostly highly ionised atoms that have not been measured; for the simplest ones, e.g. H I, the calculation is more accurate than measurement); semi-empirical - from interpolation, extrapolation or another semi-empirical method.
