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- 72 (Atomic Number of Hafnium)
- Electronegativity (pauling) of Californium in kcal/mol
H
Hydrogen
7 known isotopes (2 stable,
5 radioactive)
1H Stable
Mass
1.007825 u
Abundance 99.9855%
Half-life Stable
Spin/Parity 1/2+
Decay Mode(s) —
2H Stable
Mass
2.014102 u
Abundance 0.0145%
Half-life Stable
Spin/Parity 1+
Decay Mode(s) —
3H
Mass
3.016049 u
Abundance —
Half-life 12.32 years
Spin/Parity 1/2+
Decay Mode(s) β⁻ (100%)
4H
Mass
4.026432 u
Abundance —
Half-life Unknown
Spin/Parity 2-
Decay Mode(s) Neutron emission (100%)
5H
Mass
5.035311 u
Abundance —
Half-life 5.3 MeV (resonance width)
Spin/Parity (1/2+)
Decay Mode(s) Two-neutron emission (100%)
6H
Mass
6.044955 u
Abundance —
Half-life 1.55 MeV (resonance width)
Spin/Parity —
Decay Mode(s) Unknown
7H
Mass
7.052749 u
Abundance —
Half-life 0.09 MeV (resonance width)
Spin/Parity (1/2+)
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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