Science Education Home Home Teachers Students Games Videos VA SOL Programs

It's Elemental

Isotopes of the Element Argon

[Click for Main Data]

Argon

Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information.

Isotopes With A Known Natural Abundance

Mass NumberNatural AbundanceHalf-life
360.3336%STABLE
380.0629%STABLE
4099.6035%STABLE

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
3020 nanosecondsProton Emission (suspected)No Data Available
3114.4 millisecondsElectron Capture with
delayed Proton Emission
62.00%
Electron Capture with
delayed Double Proton Emission
8.50%
Electron Capture100.00%
32100.5 millisecondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
35.60%
33173.0 millisecondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
38.70%
34844.5 millisecondsElectron Capture100.00%
351.7756 secondsElectron Capture100.00%
36STABLE--
3735.04 daysElectron Capture100.00%
38STABLE--
39269 yearsBeta-minus Decay100.00%
40STABLE--
41109.61 minutesBeta-minus Decay100.00%
4232.9 yearsBeta-minus Decay100.00%
435.37 minutesBeta-minus Decay100.00%
4411.87 minutesBeta-minus Decay100.00%
4521.48 secondsBeta-minus Decay100.00%
468.4 secondsBeta-minus Decay100.00%
471.23 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
< 0.20%
48475 millisecondsBeta-minus Decay100.00%
49170 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
65.00%
5085 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
35.00%
51> 200 nanosecondsBeta-minus DecayNo Data Available
52> 620 nanosecondsBeta-minus Decay (suspected)No Data Available
53> 620 nanosecondsBeta-minus Decay (suspected)No Data Available
53m620 nanosecondsBeta-minus Decay with
delayed Neutron Emission (suspected)
No Data Available
53m1> 620 nanosecondsBeta-minus Decay with delayed
Double Neutron Emission (suspected)
No Data Available

Citation and linking information

For questions about this page, please contact Carol McKisson.