Kadmij
48
Cd
Skupina
12
Perioda
5
Blok
d
Protoni
Elektroni
Nevtroni
48
48
64
Splošne lastnosti
Vrstno število
48
Atomska teža
112,411
Masno število
112
Kategorija
Prehodne kovine
Barva
Srebrna
Radioaktivno
Ne
From the Latin word cadmia, Greek kadmeia - the ancient name for calamine, zinc carbonate
Kristalna struktura
Heksagonalna
Zgodovina
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.
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.
Elektroni po lupinah
2, 8, 18, 18, 2
Razporeditev elektronov
[Kr] 4d10 5s2
Cadmium is a soft metal which is easily cut with a knife
Fizikalne lastnosti
Faza snovi
Trdnina
Gostota
8,69 g/cm3
Tališče
594,22 K | 321,07 °C | 609,93 °F
Vrelišče
1040,15 K | 767 °C | 1412,6 °F
Talilna toplota
6,3 kJ/mol
Izparilna toplota
100 kJ/mol
Toplotna kapaciteta
0,232 J/g·K
Zastopanost v Zemljini skorji
0,000015%
Zastopanost v vesolju
2×10-7%
CAS številka
7440-43-9
PubChem CID številka
23973
Atomske lastnosti
Atomski polmer
151 pm
Kovalentni polmer
144 pm
Elektronegativnost
1,69 (Paulingova lestvica)
Ionizacijski potencial
8,9938 eV
Atomski volumen
13,1 cm3/mol
Toplotna prevodnost
0,968 W/cm·K
Oksidacijska stanja
1, 2
Uporabe
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.
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
Izotopi
Stabilni izotopi
106Cd, 108Cd, 110Cd, 111Cd, 112Cd, 114CdNestabilni izotopi
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