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[ATOM]

Cadmium

[ATOM]
Information valid for Cd-112 unless otherwise noted

Basic Information


Symbol: Cd
Atomic Number: 48
Mass: 112.411
Melting Point: 320.9 C
Boiling Point: 765.0 C
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

[Bohr Model of Cadmium]
Number of Energy Levels: 5

  1. First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 18
    Fifth Energy Level: 2

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