Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun physics The major stable isotope of nitrogen, 147N, having seven protons and seven neutrons; it accounts for well over 99% of the natural element.

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Examples

  • It decays rather rapidly, with a half-life of 5,730 years, as we have seen, to nitrogen-14.

    THE GREATEST SHOW ON EARTH RICHARD DAWKINS 2009

  • The difference is that carbon-14 has 6 protons and 8 neutrons, while nitrogen-14 has 7 protons and 7 neutrons neutrons, remember, have near-enough the same mass as protons.

    THE GREATEST SHOW ON EARTH RICHARD DAWKINS 2009

  • The difference is that carbon-14 has 6 protons and 8 neutrons, while nitrogen-14 has 7 protons and 7 neutrons neutrons, remember, have near-enough the same mass as protons.

    THE GREATEST SHOW ON EARTH RICHARD DAWKINS 2009

  • Nitrogen exists as two stable isotopes, nitrogen-14 (14N) and nitrogen-15 (15N) that can be separated by chemical exchange or by thermal diffusion.

    Nitrogen 2009

  • As the centuries go by, the carbon-14 in the corpse, or lump of wood, or piece of cloth, or whatever it is, steadily decays to nitrogen-14.

    THE GREATEST SHOW ON EARTH RICHARD DAWKINS 2009

  • As the centuries go by, the carbon-14 in the corpse, or lump of wood, or piece of cloth, or whatever it is, steadily decays to nitrogen-14.

    THE GREATEST SHOW ON EARTH RICHARD DAWKINS 2009

  • It decays rather rapidly, with a half-life of 5,730 years, as we have seen, to nitrogen-14.

    THE GREATEST SHOW ON EARTH RICHARD DAWKINS 2009

  • The combinations of these ratios things like the ratio of nitrogen-15 to nitrogen-14, as well as the fact that the gas trapped in the rock matches the Martian atmosphere, represent an irrefutable fingerprint proving that these materials originated on Mars.

    The Case for Mars Robert Zubrin 1996

  • The combinations of these ratios things like the ratio of nitrogen-15 to nitrogen-14, as well as the fact that the gas trapped in the rock matches the Martian atmosphere, represent an irrefutable fingerprint proving that these materials originated on Mars.

    The Case for Mars Robert Zubrin 1996

  • They fed the plant nematodes loaded with the isotope nitrogen-15, atoms of which have one more neutron than regular nitrogen-14.

    Yahoo! News: Business - Opinion 2012

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