¹⁴N-Nitrogen

 
14N has 7 protons and 7 neutrons.
14N is a stable isotope.
The mass excess of 14N is 2863.41683 with an uncertainty of ±0.00022.


The mass was measured using a Penning Trap and the related equations include:

Influence				 Equations

 77.9%				N2-CO 1  
    18.3%				  13CH-14N 2  
   1.4%				86Kr-N6 3  









Reference

1. H. Nakabushi, I. Katakuse, K. Ogata (1969), The Mass Difference Measurement of(12C21H4-12C16O), (12C2 1H4-14N2), (14N2-12C16O)and(12C21H4-12C22D2)Doublets Shitsuryō bunseki
17(3)
	 https://www.jstage.jst.go.jp/article/massspec1953/17/3/17_3_705/_article 

2. Simon Rainville, James K. Thompson, David E Pritchard (2004), An Ion Balance for Ultra-High-Precision Atomic Mass Measurements
  Science, 303(5656)
 https://www.science.org/doi/10.1126/science.1092320

3. Matthew Redshaw, Brianna J. Mount, Edmund G. Myers (2009), Improved atomic masses of 84,86Kr and 129,132Xe
  Physical Review A, 79(012506) 
  https://journals.aps.org/pra/abstract/10.1103/PhysRevA.79.012506