![Template:Infobox element/symbol-to-top-image/alt](https://upload.wikimedia.org/wikipedia/commons/thumb/d/d2/Liquidnitrogen.jpg/220px-Liquidnitrogen.jpg) |
Nitrogen |
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Appearance | colorless gas, liquid or solid |
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Standard atomic weight Ar, std(N) | [7001140064300000000♠14.00643, 7001140072800000000♠14.00728] conventional: 7001140070000000000♠14.007 |
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Nitrogen in the periodic cairt |
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Atomic nummer (Z) | 7 |
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Group | group 15 (pnictogens) |
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Period | period 2 |
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Block | p-block |
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Element category | Reactive nonmetal |
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Electron confeeguration | [He] 2s2 2p3 |
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Electrons per shell | 2, 5 |
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Pheesical properties |
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Phase at STP | gas |
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Meltin pynt | 63.15 K (−210.00 °C, −346.00 °F) |
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Bylin pynt | 77.36 K (−195.79 °C, −320.33 °F) |
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Density (at STP) | 1.251 g/L |
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whan liquid (at b.p.) | 0.808 g/cm3 |
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Treeple pynt | 63.1526 K, 12.53 kPa |
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Creetical pynt | 126.19 K, 3.3978 MPa |
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Heat o fusion | (N2) 0.72 kJ/mol |
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Heat o vapourisation | (N2) 5.56 kJ/mol |
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Molar heat capacity | (N2) 29.124 J/(mol·K) |
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Vapour pressur
P (Pa)
|
1
|
10
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100
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1 k
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10 k
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100 k
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at T (K)
|
37
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41
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46
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53
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62
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77
|
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Atomic properties |
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Oxidation states | −3, −2, −1, +1, +2, +3, +4, +5 strangly acidic |
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Electronegativity | Pauling scale: 3.04 |
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Ionisation energies | |
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Covalent radius | 71±1 pm |
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Van der Waals radius | 155 pm |
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Colour lines in a spectral rangeSpectral lines o nitrogen |
Ither properties |
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Naitural occurrence | primordial |
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Creestal structur | hexagonal |
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Speed o soond | (gas, 27 °C) 353 m/s |
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Thermal conductivity | 25.83 × 10−3 W/(m·K) |
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Magnetic orderin | diamagnetic |
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CAS Nummer | 7727-37-9 |
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History |
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Diskivery | Daniel Rutherford (1772) |
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Named by | Jean-Antoine Chaptal (1790) |
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Main isotopes o nitrogen |
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| references |