You can search for things like...
- Seaborgium
- Radius of Helium
- Y (Symbol of Yttrium)
- 80 (Atomic Number of Mercury)
- Half Life of Astatine in day
Th
Thorium
32 known isotopes (0 stable,
32 radioactive)
207Th
Mass
— u
Abundance —
Half-life 10 milliseconds
Spin/Parity —
Decay Mode(s) α (100%)
208Th
Mass
208.017915 u
Abundance —
Half-life 1.7 milliseconds
Spin/Parity 0+
Decay Mode(s) α (100%)
209Th
Mass
209.017601 u
Abundance —
Half-life 2.5 milliseconds
Spin/Parity (13/2+)
Decay Mode(s) α (100%)
210Th
Mass
210.015094 u
Abundance —
Half-life 16 milliseconds
Spin/Parity 0+
Decay Mode(s) α (100%)
211Th
Mass
211.014897 u
Abundance —
Half-life 37 milliseconds
Spin/Parity —
Decay Mode(s) Unknown
212Th
Mass
212.013002 u
Abundance —
Half-life 31.7 milliseconds
Spin/Parity 0+
Decay Mode(s) α (100%)
213Th
Mass
213.013011 u
Abundance —
Half-life 146 milliseconds
Spin/Parity 5/2-
Decay Mode(s) α (100%)
214Th
Mass
214.011481 u
Abundance —
Half-life 87 milliseconds
Spin/Parity 0+
Decay Mode(s) α (100%)
215Th
Mass
215.011725 u
Abundance —
Half-life 1.2 seconds
Spin/Parity (1/2-)
Decay Mode(s) α (100%)
216Th
Mass
216.011056 u
Abundance —
Half-life 26.0 milliseconds
Spin/Parity 0+
Decay Mode(s) α (100%), EC/β⁺ (0.01%)
217Th
Mass
217.013103 u
Abundance —
Half-life 0.252 milliseconds
Spin/Parity (9/2+)
Decay Mode(s) α (100%)
218Th
Mass
218.013276 u
Abundance —
Half-life 122 nanoseconds
Spin/Parity 0+
Decay Mode(s) α (100%)
219Th
Mass
219.015526 u
Abundance —
Half-life 1.025 microseconds
Spin/Parity (9/2+)
Decay Mode(s) α (100%)
220Th
Mass
220.015770 u
Abundance —
Half-life 9.7 microseconds
Spin/Parity 0+
Decay Mode(s) α (100%), Electron capture (2e-7%)
221Th
Mass
221.018186 u
Abundance —
Half-life 1.74 milliseconds
Spin/Parity (7/2+)
Decay Mode(s) α (100%)
222Th
Mass
222.018468 u
Abundance —
Half-life 2.24 milliseconds
Spin/Parity 0+
Decay Mode(s) α (100%)
223Th
Mass
223.020811 u
Abundance —
Half-life 0.60 seconds
Spin/Parity (5/2)+
Decay Mode(s) α (100%)
224Th
Mass
224.021466 u
Abundance —
Half-life 1.04 seconds
Spin/Parity 0+
Decay Mode(s) α (100%)
225Th
Mass
225.023951 u
Abundance —
Half-life 8.75 m
Spin/Parity (3/2+)
Decay Mode(s) α (90%), Electron capture (10%)
226Th
Mass
226.024904 u
Abundance —
Half-life 30.57 m
Spin/Parity 0+
Decay Mode(s) α (100%)
227Th
Mass
227.027703 u
Abundance —
Half-life 18.697 d
Spin/Parity (1/2+)
Decay Mode(s) α (100%)
228Th
Mass
228.028740 u
Abundance —
Half-life 1.9116 years
Spin/Parity 0+
Decay Mode(s) α (100%)
229Th
Mass
229.031761 u
Abundance —
Half-life 7880 years
Spin/Parity 5/2+
Decay Mode(s) α (100%)
230Th
Mass
230.033132 u
Abundance 0.0200%
Half-life 7.54E+4 years
Spin/Parity 0+
Decay Mode(s) α (100%), 24NE (5.8e-11%), Spontaneous fission (4e-12%)
231Th
Mass
231.036303 u
Abundance —
Half-life 25.57 h
Spin/Parity 5/2+
Decay Mode(s) β⁻ (100%)
232Th
Mass
232.038054 u
Abundance 99.9800%
Half-life 1.40E10 years
Spin/Parity 0+
Decay Mode(s) α (100%), Spontaneous fission (1.1e-9%)
233Th
Mass
233.041580 u
Abundance —
Half-life 21.83 m
Spin/Parity 1/2+
Decay Mode(s) β⁻ (100%)
234Th
Mass
234.043600 u
Abundance —
Half-life 24.10 d
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
235Th
Mass
235.047255 u
Abundance —
Half-life 7.2 m
Spin/Parity (1/2+)
Decay Mode(s) β⁻ (100%)
236Th
Mass
236.049657 u
Abundance —
Half-life 37.5 m
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
237Th
Mass
237.053629 u
Abundance —
Half-life 4.8 m
Spin/Parity (5/2+)
Decay Mode(s) β⁻ (100%)
238Th
Mass
238.056388 u
Abundance —
Half-life 9.4 m
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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7