82 Pb 207.21

Lead

POST-TRANSITION METAL

Phase: Solid

Discovered: Middle East

Block: P

Summary

Lead (/lɛd/) is a chemical element in the carbon group with symbol Pb (from Latin:plumbum) and atomic number 82. Lead is a soft, malleable and heavy post-transition metal. Metallic lead has a bluish-white color after being freshly cut, but it soon tarnishes to a dull grayish color when exposed to air.

Appearance: metallic gray

Source: Wikipedia

Physical Properties

Atomic Mass 207.21 u

Density 11.34 g/cm³

Melting Point 600.61 K

Boiling Point 2022 K

Molar Heat 26.65 J/(mol·K)

Electron Affinity 34.4204 kJ/mol

Ionization Energies

1^st: 715.6 kJ/mol

2^nd: 1450.5 kJ/mol

3^rd: 3081.5 kJ/mol

4^th: 4083 kJ/mol

5^th: 6640 kJ/mol