Kadmij

48
Cd
Skupina
12
Perioda
5
Blok
d
Protons
Electrons
Neutrons
48
48
64
General Properties
Vrstno število
48
Atomska teža
112,411
Mass Number
112
Kategorija
Prehodne kovine
Barva
Silver
Radioactive
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.
Electrons per shell
2, 8, 18, 18, 2
Razporeditev elektronov
[Kr] 4d10 5s2
Cd
Cadmium is a soft metal which is easily cut with a knife
Physical Properties
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
Abundance in Earth's crust
0,000015%
Abundance in Universe
2×10-7%
A
Zasluge za slike: Wikimedia Commons (Alchemist-hp)
A crystal cadmium bar made by the flux process
CAS Number
7440-43-9
PubChem CID Number
23973
Atomic Properties
Atomski polmer
151 pm
Kovalentni polmer
144 pm
Elektronegativnost
1,69 (Paulingova lestvica)
Ionization Potential
8,9938 eV
Atomic Volume
13,1 cm3/mol
Toplotna prevodnost
0,968 W/cm·K
Oksidacijska stanja
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