 Notable Isotopes  |
|
 36Ar [18 neutrons] |
 Abundance: 0.337%
|
| Stable with 18 neutrons
|
|
| 37Ar [19 neutrons] |
| Abundance: synthetic
|
| Half life: 35 days [ Electron Capture ]
|
| Decay Energy: unknown MeV |
| Decays to 37Cl.
|
| 37Ar is created from the decay of 40Ca as a result of subsurface nuclear explosions. It has a half-llife of 35 days.
|
|
|
| 38Ar [20 neutrons] |
| Abundance: 0.063%
|
| Stable with 20 neutrons
|
|
| 39Ar [21 neutrons] |
| Abundance: synthetic
|
| Half life: 269 years [ beta- ]
|
| Decay Energy: 0.565 MeV |
| Decays to 39K.
|
| In the Earth's atmosphere, 39Ar is made by cosmic ray activity, primarily with 40Ar.
|
|
|
| 42K [24 neutrons] |
| Abundance: synthetic
|
| Half life: 32.9 years [ beta- ]
|
| Decay Energy: 0.600 MeV |
| Decays to 42K.
|