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- Neon
- Isotopic Abundances of Cesium
- Ne (Symbol of Neon)
- 101 (Atomic Number of Mendelevium)
- Neel Point of Praseodymium in °C
Ce
Cerium
38 known isotopes (2 stable,
36 radioactive)
121Ce
Mass
120.943435 u
Abundance —
Half-life 1.1 seconds
Spin/Parity (5/2)
Decay Mode(s) EC/β⁺ (100%), ECP (1%)
122Ce
Mass
121.937870 u
Abundance —
Half-life Unknown
Spin/Parity 0+
Decay Mode(s) Unknown
123Ce
Mass
122.935280 u
Abundance —
Half-life 3.8 seconds
Spin/Parity (5/2)
Decay Mode(s) EC/β⁺ (100%), ECP (0%)
124Ce
Mass
123.930310 u
Abundance —
Half-life 6 seconds
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
125Ce
Mass
124.928440 u
Abundance —
Half-life 9.7 seconds
Spin/Parity (7/2-)
Decay Mode(s) EC/β⁺ (100%)
126Ce
Mass
125.923971 u
Abundance —
Half-life 51.0 seconds
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
127Ce
Mass
126.922727 u
Abundance —
Half-life 34 seconds
Spin/Parity (1/2+)
Decay Mode(s) EC/β⁺ (100%)
128Ce
Mass
127.918911 u
Abundance —
Half-life 3.93 m
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
129Ce
Mass
128.918102 u
Abundance —
Half-life 3.5 m
Spin/Parity (5/2+)
Decay Mode(s) EC/β⁺ (100%)
130Ce
Mass
129.914736 u
Abundance —
Half-life 22.9 m
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
131Ce
Mass
130.914429 u
Abundance —
Half-life 10.3 m
Spin/Parity 7/2+
Decay Mode(s) EC/β⁺ (100%), β⁺ (11%)
132Ce
Mass
131.911466 u
Abundance —
Half-life 3.51 h
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
133Ce
Mass
132.911520 u
Abundance —
Half-life 97 m
Spin/Parity 1/2+
Decay Mode(s) EC/β⁺ (100%)
134Ce
Mass
133.908928 u
Abundance —
Half-life 3.16 d
Spin/Parity 0+
Decay Mode(s) Electron capture (100%)
135Ce
Mass
134.909161 u
Abundance —
Half-life 17.7 h
Spin/Parity 1/2(+)
Decay Mode(s) EC/β⁺ (100%)
136Ce Stable
Mass
135.907129 u
Abundance 0.1860%
Half-life Stable
Spin/Parity 0+
Decay Mode(s) —
137Ce
Mass
136.907762 u
Abundance —
Half-life 9.0 h
Spin/Parity 3/2+
Decay Mode(s) EC/β⁺ (100%)
138Ce
Mass
137.905994 u
Abundance 0.2510%
Half-life 4.4E+16 years
Spin/Parity 0+
Decay Mode(s) 2EC (100%)
139Ce
Mass
138.906647 u
Abundance —
Half-life 137.63 d
Spin/Parity 3/2+
Decay Mode(s) Electron capture (100%)
140Ce Stable
Mass
139.905448 u
Abundance 88.4490%
Half-life Stable
Spin/Parity 0+
Decay Mode(s) —
141Ce
Mass
140.908286 u
Abundance —
Half-life 32.504 d
Spin/Parity 7/2-
Decay Mode(s) β⁻ (100%)
142Ce
Mass
141.909250 u
Abundance 11.1140%
Half-life 5E+16 years
Spin/Parity 0+
Decay Mode(s) Unknown
143Ce
Mass
142.912392 u
Abundance —
Half-life 33.039 h
Spin/Parity 3/2-
Decay Mode(s) β⁻ (100%)
144Ce
Mass
143.913653 u
Abundance —
Half-life 284.91 d
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
145Ce
Mass
144.917265 u
Abundance —
Half-life 3.01 m
Spin/Parity (5/2-)
Decay Mode(s) β⁻ (100%)
146Ce
Mass
145.918812 u
Abundance —
Half-life 13.49 m
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
147Ce
Mass
146.922690 u
Abundance —
Half-life 56.4 seconds
Spin/Parity (5/2-)
Decay Mode(s) β⁻ (100%)
148Ce
Mass
147.924424 u
Abundance —
Half-life 56.8 seconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
149Ce
Mass
148.928427 u
Abundance —
Half-life 5.12 seconds
Spin/Parity (3/2-)
Decay Mode(s) β⁻ (100%)
150Ce
Mass
149.930384 u
Abundance —
Half-life 4.0 seconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
151Ce
Mass
150.934272 u
Abundance —
Half-life 1.76 seconds
Spin/Parity (5/2+)
Decay Mode(s) β⁻ (100%)
152Ce
Mass
151.936682 u
Abundance —
Half-life 1.4 seconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
153Ce
Mass
152.941052 u
Abundance —
Half-life 0.865 seconds
Spin/Parity —
Decay Mode(s) β⁻ (100%)
154Ce
Mass
153.943940 u
Abundance —
Half-life 0.722 seconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
155Ce
Mass
154.948706 u
Abundance —
Half-life 313 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%)
156Ce
Mass
155.951884 u
Abundance —
Half-life 0.233 seconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
157Ce
Mass
156.957133 u
Abundance —
Half-life 0.18 seconds
Spin/Parity (7/2+)
Decay Mode(s) β⁻ (100%)
158Ce
Mass
157.960773 u
Abundance —
Half-life 99 milliseconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
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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