Cadmium

TRANSITION METAL · GROUP 12 · PERIOD 5

Cadmium

112.41

Atomic Data

[Kr] 4d¹⁰ 5s²

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
O	5	5s	2	48
Total			48	48

Cadmium has eight naturally occurring stable isotopes. The most abundant is ¹¹⁴Cd, comprising 28.73% of all naturally occurring Cadmium.

Isotope	Symbol	Protons	Neutrons	Abundance	Stability
Cadmium-106	¹⁰⁶Cd	48	58	1.25	Stable
Cadmium-108	¹⁰⁸Cd	48	60	0.89	Stable
Cadmium-110	¹¹⁰Cd	48	62	12.49	Stable
Cadmium-111	¹¹¹Cd	48	63	12.8	Stable
Cadmium-112	¹¹²Cd	48	64	24.13	Stable
Cadmium-113	¹¹³Cd	48	65	12.22	Stable
Cadmium-114	¹¹⁴Cd	48	66	28.73	Stable
Cadmium-116	¹¹⁶Cd	48	68	7.49	Stable

Cadmium is present in Earth's crust at approximately 0.15 ppm by mass and at approximately 2 ppm by mass throughout the universe.

Cadmium

0.15 ppm

Silicon (ref.)

277,000 ppm

Oxygen (ref.)

461,000 ppm

Cadmium

2 ppm

Helium (ref.)

230,000 ppm

Hydrogen (ref.)

739,000 ppm

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