82 2 · 8 · 18 · 32 · 18 · 4

Lead, Pb, element 82

Post-transition metal· Period 6· Group 14· p-block

Configuration [Xe]4f145d106s26p2

Atomic weight
207.2Da
Phase
solid
Density
11.3g/cm³
Melting point
600.612K 327.46 °C
Boiling point
2,022.15K 1,749 °C
Electronegativity
1.8

Heavy dull grey ductile metallic element, belongs to group 14. Used in building construction, lead-place accumulators, bullets and shot, and is part of solder, pewter, bearing metals, type metals and fusible alloys. Description from mendeleev.

Back to the table
The outermost shell: the valence electronsThe inner shellsThe nucleus One bead for each electron, on the ring of its shell, counted from the nucleus out. The rings turn at their own pace; the model is Bohr's picture of the atom, which places electrons in shells but not on true orbits.

Atomic properties

5 of 5 fields have a value for lead

Atomic weight The standard atomic weight. For an element with no stable isotope, the mass of its longest-lived isotope.
207.2Da
Source: mendeleev
Electron configuration
[Xe]4f145d106s26p2
Source: mendeleev
Uncertainty of the atomic weight
0.1Da
Source: mendeleev
Electron configuration in full The electron configuration with the noble-gas core written out.
1s22s22p63s23p63d104s24p64d104f145s25p65d106s26p2
Source: Worked outfrom electron configuration
Electrons in each shell Counted from the electron configuration, from the first shell outward.
2 · 8 · 18 · 32 · 18 · 4
Source: Worked outfrom electron configuration

Screening of each subshell

Clementi's screening constants: how much of the nucleus's charge the other electrons hide from an electron in each subshell. What is left is the effective nuclear charge it feels.

SubshellScreening σEffective charge Z − σ
1s1.580580.4195
2s21.5760.43
2p4.523477.4766
3s23.847758.1523
3p22.850559.1495
3d13.453368.5467
4s35.107246.8928
4p35.966446.0336
4d37.680444.3196
4f38.031243.9688
5s51.868530.1315
5p53.9728.03
5d58.84823.152
6s67.914.1
6p69.60712.393