Nitrogen-25

Properties and data of the isotope ²⁵N.

Content

General data

Name of the isotope:Nitrogen-25; N-25Symbol:²⁵N or 257NMass number A:25 (= number of nucleons)Atomic number Z:7 (= number of protons)Neutrons N:18Isotopic mass:25.06010(54) u (atomic weight of Nitrogen-25)Nuclide mass:25.05626 u (calculated nuclear mass without electrons)Mass excess:55.98279 MeVMass defect:0.150643712 u (per nucleus)Nuclear binding energy:140.32371387 MeV (per nucleus)
5.61294855 MeV (average binding energy per nucleon)Half-life:< 260 nsDecay constant λ:2665950.6944613 s^-1Specific activity α:6.421892243076 × 10⁺²⁸ Bq g^-1
1.735646552182 × 10⁺¹⁸ Ci g^-1Spin and parity:
(nuclear angular momentum)1/2-

Radioactive Decay

Half-life T_½ = < 260 ns respectively 2.6 × 10^-7 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
n ?	²⁴N

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 18) and isobaric (same nucleon number A = 25) with Nitrogen-25. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 18	Isobar A = 25
7	²⁵N	²⁵N
8	²⁶O	²⁵O
9	²⁷F	²⁵F
10	²⁸Ne	²⁵Ne
11	²⁹Na	²⁵Na
12	³⁰Mg	²⁵Mg
13	³¹Al	²⁵Al
14	³²Si	²⁵Si
15	³³P	²⁵P
16	³⁴S
17	³⁵Cl
18	³⁶Ar
19	³⁷K
20	³⁸Ca
21	³⁹Sc
22	⁴⁰Ti
23	⁴¹V
24	⁴²Cr
25	⁴³Mn