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- Meitnerium
- Poisson Ratio of Neon
- Si (Symbol of Silicon)
- 6 (Atomic Number of Carbon)
- Curie Point of Bismuth in °C
Cs
Cesium
41 known isotopes (1 stable,
40 radioactive)
112Cs
Mass
111.950172 u
Abundance —
Half-life 0.49 milliseconds
Spin/Parity (1+)
Decay Mode(s) Proton emission (100%), α (0.26%)
113Cs
Mass
112.944428 u
Abundance —
Half-life 17.7 microseconds
Spin/Parity (3/2+)
Decay Mode(s) Proton emission (100%)
114Cs
Mass
113.941292 u
Abundance —
Half-life 0.57 seconds
Spin/Parity (1+)
Decay Mode(s) EC/β⁺ (99.982%), ECP (8.7%), ECA (0.19%)
115Cs
Mass
114.935910 u
Abundance —
Half-life 1.4 seconds
Spin/Parity —
Decay Mode(s) EC/β⁺ (100%), β⁺p (0.07%)
116Cs
Mass
115.933395 u
Abundance —
Half-life 0.70 seconds
Spin/Parity (1+)
Decay Mode(s) EC/β⁺ (100%), ECP (2.8%), ECA (0.049%)
117Cs
Mass
116.928617 u
Abundance —
Half-life 8.4 seconds
Spin/Parity (9/2+)
Decay Mode(s) EC/β⁺ (100%)
118Cs
Mass
117.926560 u
Abundance —
Half-life 14 seconds
Spin/Parity 2(-)
Decay Mode(s) EC/β⁺ (100%), ECP (0.042%), ECA (0.0024%)
119Cs
Mass
118.922377 u
Abundance —
Half-life 43.0 seconds
Spin/Parity 9/2+
Decay Mode(s) EC/β⁺ (100%)
120Cs
Mass
119.920677 u
Abundance —
Half-life 61.3 seconds
Spin/Parity 2(+)
Decay Mode(s) EC/β⁺ (100%), β⁺α (0.00002%), β⁺p (0.000007%)
121Cs
Mass
120.917227 u
Abundance —
Half-life 155 seconds
Spin/Parity 3/2(+)
Decay Mode(s) EC/β⁺ (100%)
122Cs
Mass
121.916108 u
Abundance —
Half-life 21.18 seconds
Spin/Parity 1+
Decay Mode(s) EC/β⁺ (100%)
123Cs
Mass
122.912996 u
Abundance —
Half-life 5.86 m
Spin/Parity 1/2(+)
Decay Mode(s) EC/β⁺ (100%)
124Cs
Mass
123.912247 u
Abundance —
Half-life 30.9 seconds
Spin/Parity 1+
Decay Mode(s) EC/β⁺ (100%)
125Cs
Mass
124.909726 u
Abundance —
Half-life 46.7 m
Spin/Parity 1/2(+)
Decay Mode(s) EC/β⁺ (100%)
126Cs
Mass
125.909446 u
Abundance —
Half-life 1.643 m
Spin/Parity 1+
Decay Mode(s) EC/β⁺ (100%)
127Cs
Mass
126.907418 u
Abundance —
Half-life 6.25 h
Spin/Parity 1/2+
Decay Mode(s) EC/β⁺ (100%)
128Cs
Mass
127.907748 u
Abundance —
Half-life 3.640 m
Spin/Parity 1+
Decay Mode(s) EC/β⁺ (100%)
129Cs
Mass
128.906066 u
Abundance —
Half-life 32.06 h
Spin/Parity 1/2+
Decay Mode(s) EC/β⁺ (100%)
130Cs
Mass
129.906709 u
Abundance —
Half-life 29.21 m
Spin/Parity 1+
Decay Mode(s) EC/β⁺ (98.4%), β⁻ (1.6%)
131Cs
Mass
130.905468 u
Abundance —
Half-life 9.689 d
Spin/Parity 5/2+
Decay Mode(s) Electron capture (100%)
132Cs
Mass
131.906438 u
Abundance —
Half-life 6.480 d
Spin/Parity 2+
Decay Mode(s) EC/β⁺ (98.13%), β⁻ (1.87%)
133Cs Stable
Mass
132.905452 u
Abundance 100.0000%
Half-life Stable
Spin/Parity 7/2+
Decay Mode(s) —
134Cs
Mass
133.906719 u
Abundance —
Half-life 2.0652 years
Spin/Parity 4+
Decay Mode(s) β⁻ (99.9997%), Electron capture (0.0003%)
135Cs
Mass
134.905977 u
Abundance —
Half-life 2.3E+6 years
Spin/Parity 7/2+
Decay Mode(s) β⁻ (100%)
136Cs
Mass
135.907311 u
Abundance —
Half-life 13.01 d
Spin/Parity 5+
Decay Mode(s) β⁻ (100%)
137Cs
Mass
136.907089 u
Abundance —
Half-life 30.08 years
Spin/Parity 7/2+
Decay Mode(s) β⁻ (100%)
138Cs
Mass
137.911017 u
Abundance —
Half-life 32.5 m
Spin/Parity 3-
Decay Mode(s) β⁻ (100%)
139Cs
Mass
138.913364 u
Abundance —
Half-life 9.27 m
Spin/Parity 7/2+
Decay Mode(s) β⁻ (100%)
140Cs
Mass
139.917284 u
Abundance —
Half-life 63.7 seconds
Spin/Parity 1-
Decay Mode(s) β⁻ (100%)
141Cs
Mass
140.920045 u
Abundance —
Half-life 24.84 seconds
Spin/Parity 7/2+
Decay Mode(s) β⁻ (100%), β⁻n (0.035%)
142Cs
Mass
141.924300 u
Abundance —
Half-life 1.684 seconds
Spin/Parity 0-
Decay Mode(s) β⁻ (100%), β⁻n (0.09%)
143Cs
Mass
142.927347 u
Abundance —
Half-life 1.791 seconds
Spin/Parity 3/2+
Decay Mode(s) β⁻ (100%), β⁻n (1.64%)
144Cs
Mass
143.932075 u
Abundance —
Half-life 0.994 seconds
Spin/Parity 1(-)
Decay Mode(s) β⁻ (100%), β⁻n (3.03%)
145Cs
Mass
144.935529 u
Abundance —
Half-life 0.587 seconds
Spin/Parity 3/2+
Decay Mode(s) β⁻ (100%), β⁻n (14.7%)
146Cs
Mass
145.940622 u
Abundance —
Half-life 0.3220 seconds
Spin/Parity 1-
Decay Mode(s) β⁻ (100%), β⁻n (14.2%)
147Cs
Mass
146.944262 u
Abundance —
Half-life 0.2295 seconds
Spin/Parity (3/2+)
Decay Mode(s) β⁻ (100%), β⁻n (28.5%)
148Cs
Mass
147.949639 u
Abundance —
Half-life 146 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%), β⁻n (25.1%)
149Cs
Mass
148.953516 u
Abundance —
Half-life 107 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%), β⁻n (25%)
150Cs
Mass
149.959023 u
Abundance —
Half-life 84 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%), β⁻n (20%)
151Cs
Mass
150.963199 u
Abundance —
Half-life 69 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%)
152Cs
Mass
151.968728 u
Abundance —
Half-life 50 milliseconds
Spin/Parity —
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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