Atomic # = 82
Atomic weight = 207.2
Lead is used in car batteries. The reaction:
2 PbSO4(s) + 2 H2O(l) –> Pb(s) + PbO2(s) + 2 H2SO4(aq)
generates about 2 Volts. Six cells that run this reaction are combined to make a 12 Volt car battery. The symbol for lead, Pb, comes from its Latin name, Plumbum.