Pb
Post-transition metal
Lead
Z 82A 207mass 207.2
Slow-motion stage
Lead-210
proton
neutron
electron (β⁻)
Parent nucleus · 210 nucleons
82 protons (coral) and 128 neutrons (blue) are packed together and held by the strong force.
A real decay takes about 10⁻²¹ s. At ⅓× this stage stretches it across eleven seconds.
Choose a reaction
Reaction
21082Pb21083Bi+β⁻+ ν̄
A neutron turns into a proton. An electron and an antineutrino fly out.
Z
8283
+1
A
210210
no change
n⁰
128127
-1
Energy released
0.064MeV
Electron (max)0.064 MeV
Mass convertedE = Δm c²0.00007 u
In joules1.03 × 10-14 J
Compared with a bonda C–C bond is 3.6 eV≈ 17,778 ×
Half-life of Lead-210
22.3 years
Part of the natural uranium decay chain.
The particle
- Charge
- −1
- Mass
- 1/1836 u
- Speed
- Up to 99.9% of the speed of light
- Ionising power
- Moderate
- Stopped by
- A few millimetres of aluminium