Kadmium

48
Cd
Gruppe
12
Periode
5
Blokk
d
Protons
Electrons
Neutrons
48
48
64
Generelle eigenskapar
Atomnummer
48
Atommasse
112,411
Mass Number
112
Kategori
Transisjonsmetall
Farge
Silver
Radioactive
Nei
From the Latin word cadmia, Greek kadmeia - the ancient name for calamine, zinc carbonate
Krystallstruktur
Simple Hexagonal
Historie
Cadmium was discovered by German chemist Friedrich Stromeyer in 1817 as an impurity in zinc carbonate.

Stromeyer noted that some impure samples of calamine (zinc carbonate) changed color when heated but pure calamine did not.

Cadmium was independently discovered by German chemist Karl Hermann in 1818.
Elektron per energinivå
2, 8, 18, 18, 2
Elektronkonfigurasjon
[Kr] 4d10 5s2
Cd
Cadmium is a soft metal which is easily cut with a knife
Fysiske eigenskapar
Tilstandsform
Fast stoff
Tettleik
8,69 g/cm3
Smeltepunkt
594,22 K | 321,07 °C | 609,93 °F
Kokepunkt
1040,15 K | 767 °C | 1412,6 °F
Smeltevarme
6,3 kJ/mol
Fordampingsvarme
100 kJ/mol
Spesifikk varmekapasitet
0,232 J/g·K
Abundance in Earth's crust
0,000015%
Abundance in Universe
2×10-7%
A
Image Credits: Wikimedia Commons (Alchemist-hp)
A crystal cadmium bar made by the flux process
CAS Number
7440-43-9
PubChem CID Number
23973
Atom eigenskapar
Atomradius
151 pm
Kovalent radius
144 pm
Elektronegativitet
1,69 (Paulings skala)
Ioniseringspotensial
8,9938 eV
Molart volum
13,1 cm3/mol
Termisk konduktivitet
0,968 W/cm·K
Oksidasjonstrinn
1, 2
Applications
Cadmium is a key component in battery production.

It is also is used in electroplating.

Cadmium oxide is used in black and white television phosphors and in the blue and green phosphors for color television picture tubes.

Cadmium is used as a barrier to control neutrons in nuclear fission.
Cadmium and its compounds are highly toxic
Isotopes
Stable Isotopes
106Cd, 108Cd, 110Cd, 111Cd, 112Cd, 114Cd
Unstable Isotopes
95Cd, 96Cd, 97Cd, 98Cd, 99Cd, 100Cd, 101Cd, 102Cd, 103Cd, 104Cd, 105Cd, 107Cd, 109Cd, 113Cd, 115Cd, 116Cd, 117Cd, 118Cd, 119Cd, 120Cd, 121Cd, 122Cd, 123Cd, 124Cd, 125Cd, 126Cd, 127Cd, 128Cd, 129Cd, 130Cd, 131Cd, 132Cd