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| Line 4: | Line 4: | ||
| | symbol =N | | symbol =N | ||
| | mass_number =15 | | mass_number =15 | ||
| | mass = | | mass = 15.000 108 898 4(9) | ||
| | num_neutrons =8 | | num_neutrons =8 | ||
| | num_protons =7 | | num_protons =7 | ||
Revision as of 04:06, 6 February 2009
| General | |
|---|---|
| Symbol | N |
| Names | nitrogen-15, 15N, N-15 |
| Protons (Z) | 7 |
| Neutrons (N) | 8 |
| Nuclide data | |
| Natural abundance | 0.37% |
| Isotope mass | 15.000 108 898 4(9) Da |
| Spin | ½ |
| Parent isotopes | O (β) |
| Isotopes of nitrogen Complete table of nuclides | |
Nitrogen-15 is a stable, non-radioactive isotope of nitrogen. It is often used in agricultural and medical research. Nitrogen-15 is frequently used in nuclear magnetic resonance spectroscopy (NMR), because unlike the more abundant nitrogen-14, it has a nuclear spin of ½, which simplifies observation by NMR. Proteins can be isotopical labelled by cultivating them in a medium containing only nitrogen-15. In addition, nitrogen-15 is used to label proteins in quantitative proteomics (e.g. SILAC).
It is a product of oxygen-15 beta decay in stars.
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