Kadmium

48
Cd
Grupp
12
Period
5
Block
d
Protoner
Elektroner
Neutroner
48
48
64
Generella Egenskaper
Atomnummer
48
Atommassa
112,411
Masstal
112
Kategori
Övergångsmetaller
Färg
Silver
Radioaktiv
Nej
From the Latin word cadmia, Greek kadmeia - the ancient name for calamine, zinc carbonate
Kristallstruktur
Enkelt hexagonalt
Historia
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.
Elektroner per skal
2, 8, 18, 18, 2
Elektronkonfiguration
[Kr] 4d10 5s2
Cd
Cadmium is a soft metal which is easily cut with a knife
Fysikaliska Egenskaper
Aggregationstillstånd
Fast
Densitet
8,69 g/cm3
Smältpunkt
594,22 K | 321,07 °C | 609,93 °F
Kokpunkt
1040,15 K | 767 °C | 1412,6 °F
Smältvärme
6,3 kJ/mol
Ångbildningsvärme
100 kJ/mol
Specifik värmekapacitet
0,232 J/g·K
Abundance in Earth's crust
0,000015%
Abundance in Universe
2×10-7%
A
Bildkrediter: Wikimedia Commons (Alchemist-hp)
A crystal cadmium bar made by the flux process
CAS Number
7440-43-9
PubChem CID Number
23973
Atomära Egenskaper
Atomradie
151 pm
Kovalent radie
144 pm
Elektronegativitet
1,69 (Paulingskalan)
Jonisationspotential
8,9938 eV
Molvolym
13,1 cm3/mol
Värmeledningsförmåga
0,968 W/cm·K
Oxidationstillstånd
1, 2
Användningsområden
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
Isotoper
Stabila isotoper
106Cd, 108Cd, 110Cd, 111Cd, 112Cd, 114Cd
Instabila isotoper
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