Lead

POST-TRANSITION METAL · GROUP 14 · PERIOD 6

Lead

207.2

Atomic Data

[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p²

Shell	n	Subshell	Electrons	Cumulative
K	1	1s	2	2
L	2	2s	2	4
L	2	2p	6	10
M	3	3s	2	12
M	3	3p	6	18
M	3	3d	10	28
N	4	4s	2	30
N	4	4p	6	36
N	4	4d	10	46
N	4	4f	14	60
O	5	5s	2	62
O	5	5p	6	68
O	5	5d	10	78
P	6	6s	2	80
P	6	6p	2	82
Total			82	82

Lead has four naturally occurring stable isotopes. The most abundant is ²⁰⁸Pb, comprising 52.4% of all naturally occurring Lead.

Isotope	Symbol	Protons	Neutrons	Abundance	Stability
Lead-204	²⁰⁴Pb	82	122	1.4	Stable
Lead-206	²⁰⁶Pb	82	124	24.1	Stable
Lead-207	²⁰⁷Pb	82	125	22.1	Stable
Lead-208	²⁰⁸Pb	82	126	52.4	Stable

Lead is present in Earth's crust at approximately 14 ppm by mass and at approximately 0.6 ppm by mass throughout the universe.

Lead

14 ppm

Silicon (ref.)

277,000 ppm

Oxygen (ref.)

461,000 ppm

Lead

0.6 ppm

Helium (ref.)

230,000 ppm

Hydrogen (ref.)

739,000 ppm

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