Kadmium

48
Cd
Golongan
12
Periode
5
Blok
d
Proton
Elektron
Neutron
48
48
64
Sifat Umum
Nomor atom
48
Massa atom
112,411
Nomor massa
112
Kategori
Logam transisi
Warna
Perak
Radioaktif
Tidak
From the Latin word cadmia, Greek kadmeia - the ancient name for calamine, zinc carbonate
Struktur kristal
Segienam Sederhana
Sejarah
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 kulit
2, 8, 18, 18, 2
Konfigurasi elektron
[Kr] 4d10 5s2
Cd
Cadmium is a soft metal which is easily cut with a knife
Sifat Fisika
Fase
Solid
Kepadatan
8,69 g/cm3
Titik lebur
594,22 K | 321,07 °C | 609,93 °F
Titik didih
1040,15 K | 767 °C | 1412,6 °F
Kalor peleburan
6,3 kJ/mol
Kalor penguapan
100 kJ/mol
Kapasitas kalor molar
0,232 J/g·K
Kelimpahan di kerak bumi
0,000015%
Kelimpahan di alam semesta
2×10-7%
A
Kredit Gambar: Wikimedia Commons (Alchemist-hp)
A crystal cadmium bar made by the flux process
Nomor CAS
7440-43-9
PubChem CID Number
23973
Sifat Atom
Jari-jari atom
151 pm
Jari-jari kovalen
144 pm
Elektronegativitas
1,69 (Skala Pauling)
Potensi Ionisasi
8,9938 eV
Volume atom
13,1 cm3/mol
Kondusivitas termal
0,968 W/cm·K
Bilangan oksidasi
1, 2
Aplikasi
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
Isotop
Isotop stabil
106Cd, 108Cd, 110Cd, 111Cd, 112Cd, 114Cd
Isotop tidak stabil
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