Calcium-35
Properties and data of the isotope 35Ca.
See also: list of Calcium isotopes.
General data
Name of the isotope:Calcium-35; Ca-35Symbol:35Ca or 3520CaMass number A:35 (= number of nucleons)Atomic number Z:20 (= number of protons)Neutrons N:15Isotopic mass:35.00514(21) u (atomic weight of Calcium-35)Nuclide mass:34.9941686 u (calculated nuclear mass without electrons)Mass excess:4.78788 MeVMass defect:0.28133438 u (per nucleus)Nuclear binding energy:262.06128696 MeV (per nucleus)
7.48746534 MeV (average binding energy per nucleon)Separation energy:SN = 17.13(36) MeV (first neutron)
SP = 1.28(28) MeV (first proton)Half-life:25.7(2) msDecay constant λ:26.970707414784 s-1Specific activity α:4.640611404113 × 10+23 Bq g-1
12542192984090 Ci g-1Spin and parity:
(nuclear angular momentum)(1/2+)Mirror nucleus:Phosphorus-35Year of discovery:1985
Radioactive Decay
Half-life T½ = 25.7(2) ms respectively 2.57 × 10-2 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
β+ | 35K | < 0.1 % | 15.770 MeV | |
β+, p | 34Ar | 95.9(14) % | 15.690 MeV | |
β+, 2p | 33Cl | 4.1(6) % | 11,027 MeV | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 15) and isobaric (same nucleon number A = 35) with Calcium-35. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 15 | Isobar A = 35 |
5 | 20B | |
6 | 21C | |
7 | 22N | |
8 | 23O | |
9 | 24F | |
10 | 25Ne | |
11 | 26Na | 35Na |
12 | 27Mg | 35Mg |
13 | 28Al | 35Al |
14 | 29Si | 35Si |
15 | 30P | 35P |
16 | 31S | 35S |
17 | 32Cl | 35Cl |
18 | 33Ar | 35Ar |
19 | 34K | 35K |
20 | 35Ca | 35Ca |
21 | 36Sc | |
External data and identifiers
Last update: 2023-10-04
Perma link: https://www.chemlin.org/isotope/calcium-35
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