Chemical Elements.com - Cadmium (Cd)

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Basic Information

Name: Cadmium
Symbol: Cd
Atomic Number: 48
Atomic Mass: 112.411 amu
Melting Point: 320.9 °C (594.05 K, 609.62 °F)
Boiling Point: 765.0 °C (1038.15 K, 1409.0 °F)
Number of Protons/Electrons: 48
Number of Neutrons: 64
Classification: Transition Metal
Crystal Structure: Hexagonal
Density @ 293 K: 8.65 g/cm³
Color: Silvery

Atomic Structure

Number of Energy Levels: 5

First Energy Level:

Second Energy Level:

Third Energy Level:

Fourth Energy Level:

Fifth Energy Level:

Isotopes

Isotope	Half Life
Cd-106	Stable
Cd-108	Stable
Cd-109	462.0 days
Cd-110	Stable
Cd-111	Stable
Cd-111m	48.5 minutes
Cd-112	Stable
Cd-113	9.0E15 years
Cd-113m	14.1 years
Cd-114	Stable
Cd-115	2.2 days
Cd-115m	44.6 days
Cd-116	Stable
Cd-117	2.5 hours
Cd-118	3.4 hours

Facts

Date of Discovery: 1817
Discoverer: Fredrich Stromeyer
Name Origin: From the Greek word kadmeia (ancient name for calamine) and from the Latin word cadmia
Uses: poisonous, nickel-cadmium batteries
Obtained From: by-product of zinc refining

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