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- Livermorium
- Density of Gadolinium
- As (Symbol of Arsenic)
- 87 (Atomic Number of Francium)
- Lattice Constants of Holmium in cm
Db
Dubnium
13 known isotopes (0 stable,
13 radioactive)
255Db
Mass
255.106919 u
Abundance —
Half-life 1.6 seconds
Spin/Parity —
Decay Mode(s) α (80%), Spontaneous fission (20%)
256Db
Mass
256.107674 u
Abundance —
Half-life 1.6 seconds
Spin/Parity —
Decay Mode(s) α (70%), Electron capture (30%)
257Db
Mass
257.107520 u
Abundance —
Half-life 2.3 seconds
Spin/Parity (9/2+)
Decay Mode(s) α (94%), Spontaneous fission (6%)
258Db
Mass
258.108973 u
Abundance —
Half-life 4.3 seconds
Spin/Parity (5+ 6+)
Decay Mode(s) α (77%), EC/β⁺ (23%)
259Db
Mass
259.109492 u
Abundance —
Half-life 0.51 seconds
Spin/Parity [9/2+]
Decay Mode(s) Unknown
260Db
Mass
260.111297 u
Abundance —
Half-life 1.52 seconds
Spin/Parity —
Decay Mode(s) α (90.4%), Spontaneous fission (9.6%), Electron capture (2.5%)
261Db
Mass
261.111979 u
Abundance —
Half-life 1.8 seconds
Spin/Parity —
Decay Mode(s) α (82%), Spontaneous fission (18%)
262Db
Mass
262.114067 u
Abundance —
Half-life 35 seconds
Spin/Parity —
Decay Mode(s) α (67%)
263Db
Mass
263.114987 u
Abundance —
Half-life 27 seconds
Spin/Parity —
Decay Mode(s) Spontaneous fission (57%), α (43%)
266Db
Mass
266.121032 u
Abundance —
Half-life 0.4 h
Spin/Parity —
Decay Mode(s) Spontaneous fission (100%)
267Db
Mass
267.122399 u
Abundance —
Half-life 79 m
Spin/Parity —
Decay Mode(s) Spontaneous fission (100%), α (25%)
268Db
Mass
268.125669 u
Abundance —
Half-life 28 h
Spin/Parity —
Decay Mode(s) Spontaneous fission (100%)
270Db
Mass
270.131399 u
Abundance —
Half-life 15 h
Spin/Parity —
Decay Mode(s) Spontaneous fission (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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