Chlorine-33
Properties and data of the isotope 33Cl.
See also: list of Chlorine isotopes.
General data
Name of the isotope:Chlorine-33; Cl-33Symbol:33Cl or 3317ClMass number A:33 (= number of nucleons)Atomic number Z:17 (= number of protons)Neutrons N:16Isotopic mass:32.9774520(4) u (atomic weight of Chlorine-33)Nuclide mass:32.9681263 u (calculated nuclear mass without electrons)Mass excess:-21.00333 MeVMass defect:0.2942122 u (per nucleus)Nuclear binding energy:274.05689903 MeV (per nucleus)
8.30475452 MeV (average binding energy per nucleon)Separation energy:SN = 1.57400(7) MeV (first neutron)
SP = 2.2768(4) MeV (first proton)Half-life:2.511(4) sDecay constant λ:0.2760442774034 s-1Specific activity α:5.194929756571 × 10+21 Bq g-1
140403506934.35 Ci g-1Spin and parity:
(nuclear angular momentum)3/2+Magnetic dipole moment:μ(μN) = + 0.7547(3)Nuclear g-factor:gl = 0.50313333333333Mirror nucleus:Sulfur-33Year of discovery:1940
Radioactive Decay
Half-life T½ = 2.511(4) s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
EC/β+ | 33S | 100 % | 5.58259 MeV | |
Parent Nuclides
Direct parent isotopes are: 33Ar, 35Ca.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 16) and isobaric (same nucleon number A = 33) with Chlorine-33. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 16 | Isobar A = 33 |
5 | 21B | |
6 | 22C | |
7 | 23N | |
8 | 24O | |
9 | 25F | |
10 | 26Ne | 33Ne |
11 | 27Na | 33Na |
12 | 28Mg | 33Mg |
13 | 29Al | 33Al |
14 | 30Si | 33Si |
15 | 31P | 33P |
16 | 32S | 33S |
17 | 33Cl | 33Cl |
18 | 34Ar | 33Ar |
19 | 35K | 33K |
20 | 36Ca | |
21 | 37Sc | |
22 | 38Ti | |
External data and identifiers
Last update: 2023-10-04
Perma link: https://www.chemlin.org/isotope/chlorine-33
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