Кадмиум

48
Cd
Група
12
Периода
5
блок
d
Protons
Electrons
Neutrons
48
48
64
Општи Својства
Атомски број
48
Атомска тежина
112,411
Mass Number
112
Category
Преоден метал
Color
Silver
Radioactive
Не
From the Latin word cadmia, Greek kadmeia - the ancient name for calamine, zinc carbonate
Кристална структура
Simple Hexagonal
History
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
Електронска конфигурација
[Kr] 4d10 5s2
Cd
Cadmium is a soft metal which is easily cut with a knife
Физички Својства
Фаза
Solid
Густина
8,69 g/cm3
Точка на топење
594,22 K | 321,07 °C | 609,93 °F
Точка на вриење
1040,15 K | 767 °C | 1412,6 °F
Топлина на топење
6,3 kJ/mol
Топлина на испарување
100 kJ/mol
Specific Heat Capacity
0,232 J/g·K
Abundance in Earth's crust
0,000015%
Abundance in Universe
2×10-7%
A
Кредити на слика: Wikimedia Commons (Alchemist-hp)
A crystal cadmium bar made by the flux process
CAS Number
7440-43-9
PubChem CID Number
23973
Атомски Својства
Атомски полупречник
151 pm
Ковалентен полупречник
144 pm
Електронегативност
1,69 (Полингова скала)
Ionization Potential
8,9938 eV
Atomic Volume
13,1 cm3/mol
Thermal Conductivity
0,968 W/cm·K
Oxidation States
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