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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.
To create isotopes of a given element, choose your element, for example carbon, then add or remove neutrons. Observe what happens to the element symbol, the abundance in nature (%), and its stability.
•Nitrogen, along with K and P, is a key macronutrient •Plays a fundamental role in energy metabolism and protein synthesis •Comprises ~4% of the dry weight of plants and ~3% of animals
26 sie 2024 · Oxygen atoms with 8 neutrons would have a mass number of 16 (8 \(\mathrm p^+\) + 8 \(\mathrm n^0\)), meaning they would have a mass of about 16 amu. Some oxygen atoms have 9 neutrons, while others have 10 neutrons.
Nitrogen has two naturally occurring isotopes, nitrogen-14 and nitrogen-15, which can be separated with chemical exchanges or thermal diffusion. Nitrogen also has isotopes with masses of 12, 13, 16, and 17, but they are radioactive. Nitrogen 14 is the most abundant form of nitrogen and makes up more than 99% of all nitrogen found on Earth.
Nitrogen-15 is composed of 7 protons, 8 neutrons, and 7 electrons. Two sources of nitrogen-15 are the positron emission of oxygen-15 and the beta decay of carbon-15. Nitrogen-15 presents one of the lowest thermal neutron capture cross sections of all isotopes.
List, data and properties of all known isotopes of Nitrogen. The natural nitrogen that surrounds us consists of the stable isotopes 14 N (> 99.5%) and 15 N (< 0.4%). The CNO cycle of stellar nucleosynthesis is assumed to be the source of the 14 N-nuclide.
