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- Californium
- Group of Thulium
- Cn (Symbol of Copernicium)
- 113 (Atomic Number of Nihonium)
- Neel Point of Molybdenum in °F
Se
Selenium
33 known isotopes (5 stable,
28 radioactive)
63Se
Mass
62.981911 u
Abundance —
Half-life 13.2 milliseconds
Spin/Parity —
Decay Mode(s) EC/β⁺ (100%), ECP (89%), Two-proton emission (0.5%)
64Se
Mass
63.971165 u
Abundance —
Half-life Unknown
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
65Se
Mass
64.964552 u
Abundance —
Half-life 33 milliseconds
Spin/Parity (3/2-)
Decay Mode(s) EC/β⁺ (100%), ECP (100%)
66Se
Mass
65.955276 u
Abundance —
Half-life 42 milliseconds
Spin/Parity 0+
Decay Mode(s) Electron capture (100%)
67Se
Mass
66.949994 u
Abundance —
Half-life 133 milliseconds
Spin/Parity (5/2-)
Decay Mode(s) EC/β⁺ (100%), ECP (0.5%)
68Se
Mass
67.941825 u
Abundance —
Half-life 35.5 seconds
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
69Se
Mass
68.939415 u
Abundance —
Half-life 27.4 seconds
Spin/Parity 1/2-
Decay Mode(s) EC/β⁺ (100%), ECP (0.052%)
70Se
Mass
69.933516 u
Abundance —
Half-life 41.1 m
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
71Se
Mass
70.932209 u
Abundance —
Half-life 4.74 m
Spin/Parity (5/2-)
Decay Mode(s) EC/β⁺ (100%)
72Se
Mass
71.927141 u
Abundance —
Half-life 8.40 d
Spin/Parity 0+
Decay Mode(s) Electron capture (100%)
73Se
Mass
72.926755 u
Abundance —
Half-life 7.15 h
Spin/Parity 9/2+
Decay Mode(s) EC/β⁺ (100%)
74Se Stable
Mass
73.922476 u
Abundance 0.8600%
Half-life Stable
Spin/Parity 0+
Decay Mode(s) —
75Se
Mass
74.922523 u
Abundance —
Half-life 119.78 d
Spin/Parity 5/2+
Decay Mode(s) Electron capture (100%)
76Se Stable
Mass
75.919214 u
Abundance 9.2300%
Half-life Stable
Spin/Parity 0+
Decay Mode(s) —
77Se Stable
Mass
76.919914 u
Abundance 7.6000%
Half-life Stable
Spin/Parity 1/2-
Decay Mode(s) —
78Se Stable
Mass
77.917309 u
Abundance 23.6900%
Half-life Stable
Spin/Parity 0+
Decay Mode(s) —
79Se
Mass
78.918499 u
Abundance —
Half-life 3.27E+5 years
Spin/Parity 7/2+
Decay Mode(s) β⁻ (100%)
80Se Stable
Mass
79.916522 u
Abundance 49.8000%
Half-life Stable
Spin/Parity 0+
Decay Mode(s) —
81Se
Mass
80.917993 u
Abundance —
Half-life 18.45 m
Spin/Parity 1/2-
Decay Mode(s) β⁻ (100%)
82Se
Mass
81.916700 u
Abundance 8.8200%
Half-life 9.6E+19 years
Spin/Parity 0+
Decay Mode(s) 2B- (100%)
83Se
Mass
82.919119 u
Abundance —
Half-life 22.3 m
Spin/Parity 9/2+
Decay Mode(s) β⁻ (100%)
84Se
Mass
83.918467 u
Abundance —
Half-life 3.26 m
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
85Se
Mass
84.922261 u
Abundance —
Half-life 32.9 seconds
Spin/Parity (5/2)+
Decay Mode(s) β⁻ (100%)
86Se
Mass
85.924312 u
Abundance —
Half-life 14.3 seconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
87Se
Mass
86.928689 u
Abundance —
Half-life 5.50 seconds
Spin/Parity (3/2+)
Decay Mode(s) β⁻ (100%), β⁻n (0.36%)
88Se
Mass
87.931417 u
Abundance —
Half-life 1.53 seconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%), β⁻n (0.99%)
89Se
Mass
88.936669 u
Abundance —
Half-life 0.43 seconds
Spin/Parity (5/2+)
Decay Mode(s) β⁻ (100%), β⁻n (7.8%)
90Se
Mass
89.940096 u
Abundance —
Half-life 195 milliseconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
91Se
Mass
90.945700 u
Abundance —
Half-life 0.27 seconds
Spin/Parity —
Decay Mode(s) β⁻ (100%), β⁻n (21%)
92Se
Mass
91.949840 u
Abundance —
Half-life Unknown
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
93Se
Mass
92.956135 u
Abundance —
Half-life Unknown
Spin/Parity (1/2+)
Decay Mode(s) β⁻ (100%)
94Se
Mass
93.960490 u
Abundance —
Half-life 150 nanoseconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
95Se
Mass
94.967300 u
Abundance —
Half-life 392 nanoseconds
Spin/Parity —
Decay Mode(s) Unknown
Decay mode abbreviations:
β⁻ = Beta minus decay, β⁺ = Beta plus decay, EC = Electron capture, α = Alpha decay
n = Neutron emission, p = Proton emission, SF = Spontaneous fission, IT = Isomeric transition
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