Chemical elements
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Argon Isotopes






Proton number: 18


Stable Isotopes


Argon stable isotope number 1: 36Ar
Neutrons: 18;
Abundance: 0.3365%;
Jn: 0+;

Argon stable isotope number 2: 38Ar
Neutrons: 20;
Abundance: 0.0632%;
Jn: 0+;

Argon stable isotope number 3: 40Ar
Neutrons: 22;
Abundance: 99.6003%;
Jn: 0+;

Natural Radioactive isotopes

There is no Argon Natural Radioactive isotopes known

Artificial Radioactive isotopes


Argon radioactive isotope number 1: 30Ar
Neutrons: 12;
Jn: 0+;
Decay: p ?;
t1/2: 2E-08s ≈ 20.00 ns;

Argon radioactive isotope number 2: 31Ar
Neutrons: 13;
Jn: 5/2+;
Decay: ε : 100.00 %
ε p : 63.00 %
ε 2p : 7.20 %
EAP < 0.38 %
ε α < 0.03 %
ε 3p < 1.1E-3 %;
t1/2: 0.0144s ≈ 14.40 ms;

Argon radioactive isotope number 3: 32Ar
Neutrons: 14;
Jn: 0+;
Decay: ε : 100.00 %
ε p : 43.00 %;
t1/2: 0.098s ≈ 98.00 ms;

Argon radioactive isotope number 4: 33Ar
Neutrons: 15;
Jn: 1/2+;
Decay: ε : 100.00 %
ε p : 38.70 %;
t1/2: 0.173s ;

Argon radioactive isotope number 5: 34Ar
Neutrons: 16;
Jn: 0+;
Decay: ε : 100.00 %;
t1/2: 0.8445s ;

Argon radioactive isotope number 6: 35Ar
Neutrons: 17;
Jn: 3/2+;
Decay: ε : 100.00 %;
t1/2: 1.775s ;

Argon radioactive isotope number 7: 37Ar
Neutrons: 19;
Jn: 3/2+;
Decay: ε : 100.00 %;
t1/2: 3019680s ≈ 34.95 d;

Argon radioactive isotope number 8: 39Ar
Neutrons: 21;
Jn: 7/2-;
Decay: β - : 100.00 %;
t1/2: 8483184000s ≈ 269.00 y;

Argon radioactive isotope number 9: 41Ar
Neutrons: 23;
Jn: 7/2-;
Decay: β - : 100.00 %;
t1/2: 6576.6s ≈ 1.83 h;

Argon radioactive isotope number 10: 42Ar
Neutrons: 24;
Jn: 0+;
Decay: β - : 100.00 %;
t1/2: 1037534000s ≈ 32.90 y;

Argon radioactive isotope number 11: 43Ar
Neutrons: 25;
Jn: 5/2-;
Decay: β - : 100.00 %;
t1/2: 322.2s ≈ 5.37 m;

Argon radioactive isotope number 12: 44Ar
Neutrons: 26;
Jn: 0+;
Decay: β - : 100.00 %;
t1/2: 712.2s ≈ 11.87 m;

Argon radioactive isotope number 13: 45Ar
Neutrons: 27;
Jn: Unknown;
Decay: β - : 100.00 %;
t1/2: 21.48s ;

Argon radioactive isotope number 14: 46Ar
Neutrons: 28;
Jn: 0+;
Decay: β - : 100.00 %;
t1/2: 8.4s ;

Argon radioactive isotope number 15: 47Ar
Neutrons: 29;
Jn: 3/2-;
Decay: β - : 100.00 %
β -n < 0.002 %;
t1/2: 1.23s ;

Argon radioactive isotope number 16: 48Ar
Neutrons: 30;
Jn: 0+;
Decay: β -;
t1/2: 0.48s ;

Argon radioactive isotope number 17: 49Ar
Neutrons: 31;
Jn: Unknown;
Decay: β - : 100.00 %
β -n : 65.00 %;
t1/2: 1.7E-07s ≈ 0.17 µs;

Argon radioactive isotope number 18: 50Ar
Neutrons: 32;
Jn: 0+;
Decay: β - : 100.00 %
β -n : 35.00 %;
t1/2: 1.7E-07s ≈ 0.17 µs;

Argon radioactive isotope number 19: 51Ar
Neutrons: 33;
Jn: Unknown;
Decay: β - ?;
t1/2: 2E-07s ≈ 0.20 µs;

Argon radioactive isotope number 20: 52Ar
Neutrons: 34;
Jn: 0+;
Decay: β -;
t1/2: 0.01s ≈ 10.00 ms;

Argon radioactive isotope number 21: 53Ar
Neutrons: 35;
Jn: 5/2-;
Decay: β -n
β -;
t1/2: 0.003s ≈ 3.00 ms;
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