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- Promethium
- Melting Point of Niobium
- Lu (Symbol of Lutetium)
- 94 (Atomic Number of Plutonium)
- Boiling Point of Actinium in °F
Be
Beryllium
11 known isotopes (1 stable,
10 radioactive)
6Be
Mass
6.019726 u
Abundance —
Half-life 92 keV (resonance width)
Spin/Parity 0+
Decay Mode(s) α (100%), Two-proton emission (100%)
7Be
Mass
7.016929 u
Abundance —
Half-life 53.22 d
Spin/Parity 3/2-
Decay Mode(s) Electron capture (100%)
8Be
Mass
8.005305 u
Abundance —
Half-life 5.57 eV (resonance width)
Spin/Parity 0+
Decay Mode(s) α (100%)
9Be Stable
Mass
9.012183 u
Abundance 100.0000%
Half-life Stable
Spin/Parity 3/2-
Decay Mode(s) —
10Be
Mass
10.013535 u
Abundance —
Half-life 1.51E+6 years
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
11Be
Mass
11.021661 u
Abundance —
Half-life 13.76 seconds
Spin/Parity 1/2+
Decay Mode(s) β⁻ (100%), β⁻α (3.1%), B-P (0.00083%)
12Be
Mass
12.026922 u
Abundance —
Half-life 21.46 milliseconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%), β⁻n (0.5%)
13Be
Mass
13.036135 u
Abundance —
Half-life 2.7E-21 seconds
Spin/Parity (1/2-)
Decay Mode(s) Unknown
14Be
Mass
14.042893 u
Abundance —
Half-life 4.35 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%), β⁻n (81%), β⁻2n (5%)
15Be
Mass
15.053490 u
Abundance —
Half-life 0.58 MeV (resonance width)
Spin/Parity (5/2+)
Decay Mode(s) Neutron emission (100%)
16Be
Mass
16.061672 u
Abundance —
Half-life 0.8 MeV (resonance width)
Spin/Parity 0+
Decay Mode(s) Neutron emission (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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