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Nitrogen is a chemical element; it has symbol N and atomic number 7. Nitrogen is a nonmetal and the lightest member of group 15 of the periodic table, often called the pnictogens. It is a common element in the universe, estimated at seventh in total abundance in the Milky Way and the Solar System.
Natural nitrogen (7 N) consists of two stable isotopes: the vast majority (99.6%) of naturally occurring nitrogen is nitrogen-14, with the remainder being nitrogen-15. Thirteen radioisotopes are also known, with atomic masses ranging from 9 to 23, along with three nuclear isomers .
Nitrogen, 7 N; Liquid nitrogen (N 2 at below −196 °C) Nitrogen; Allotropes: see § Allotropes: Appearance: colorless gas, liquid or solid: ... 16 N synth: 7.13 s:
Nitrogen is the chemical element with atomic number 7, the symbol N and atomic mass 14.00674 u. Elemental nitrogen is a colorless, odorless, tasteless and mostly inert diatomic gas at standard conditions , constituting 78.08% by volume of Earth's atmosphere .
The more well-characterised ways are the end-on M←N≡N (η 1) and M←N≡N→M (μ, bis-η 1), in which the lone pairs on the nitrogen atoms are donated to the metal cation. The less well-characterised ways involve dinitrogen donating electron pairs from the triple bond, either as a bridging ligand to two metal cations ( μ , bis- η 2 ) or ...
The nitrogen cycle is an important process in the ocean as well. While the overall cycle is similar, there are different players [40] and modes of transfer for nitrogen in the ocean. Nitrogen enters the water through the precipitation, runoff, or as N 2 from the atmosphere. Nitrogen cannot be utilized by phytoplankton as N
At 32.5 K (just below the boiling point of H 2) and 15 atm, the maximum molar concentration of dissolved N 2 is 7.0 × 10 −6. [15] Nitrogen and oxygen are miscible in liquid phase but separate in solid phase. Thus excess nitrogen (melting at 63 K) or oxygen (melting at 55 K) freeze out first, and the eutectic liquid air freezes at 50 K. [16]
7N or 7°N, the 7th parallel north latitude; Canon EOS Elan 7N, a 2004 35 mm film single-lens reflex camera; Centavia, IATA airline designator; Nitrogen (7 N), a chemical element; Pye 7N, numbering system for recordings used by Pye Records; Piccadilly 7N, numbering system for recordings used by Piccadilly unit of Pye Records