Samarium

62
Sm
Kumpulan
Tiada
Kala
6
Blok
f
Proton
Elektron
Neutron
62
62
88
Ciri-Ciri Am
Nombor atom
62
Berat atom
150.36
Nombor jisim
150
Kategori
Lantanid
Warna
Perak
Radioaktif
Tidak
From samarskite, a mineral named after Russian mine official, Col. Samarski
Struktur hablur
Trigonal Ringkas
Sejarah
In 1853, Jean Charles Galissard de Marignac discovered samarium when he found lines in mineral spectra.

Paul Émile Lecoq de Boisbaudran isolated a samarium salt in Paris in 1879 from the mineral samarskite and identified a new element in it via sharp optical absorption lines.

The pure element was produced only in 1901 by Eugène-Anatole Demarçay.
Bilangan elektron per petala
2, 8, 18, 24, 8, 2
Konfigurasi elektron
[Xe] 4f6 6s2
Sm
Samarium metal can be produced by reducing the oxide with lanthanum
Ciri-Ciri Fizikal
Fasa
Pepejal
Ketumpatan
7.52 g/cm3
Takat lebur
1345.15 K | 1072 °C | 1961.6 °F
Takat didih
2067.15 K | 1794 °C | 3261.2 °F
Haba pelakuran
8.6 kJ/mol
Haba pengewapan
175 kJ/mol
Muatan haba molar
0.197 J/g·K
Banyak pada kerak bumi
0.0006%
Banyak pada alam semesta
5×10-7%
Ultrapure
Kredit imej: Images-of-elements
Ultrapure sublimated samarium
Nombor CAS
7440-19-9
PubChem CID Number
23951
Ciri-Ciri Atom
Jejari atom
180 pm
Jejari kovalen
198 pm
Keelektronegatifan
1.17 (Skala Pauling)
Kebolehan mengion
5.6437 eV
Isipadu atom
20.0 cm3/mol
Daya pengaliran terma
0.133 W/cm·K
Keadaan pengoksidaan
2, 3
Aplikasi
Samarium's main use is in samarium-cobalt alloy magnets for headphones, small motors and pickups for some electric guitars.

Radioactive samarium-153 is used to kill cancer cells in the treatment of lung cancer, prostate cancer, breast cancer and osteosarcoma.

Samarium and its compounds are also used as catalyst and chemical reagent.
Samarium is considered to be moderately toxic
Isotop
Isotop stabil
144Sm, 149Sm, 150Sm, 152Sm, 154Sm
Isotop tidak stabil
128Sm, 129Sm, 130Sm, 131Sm, 132Sm, 133Sm, 134Sm, 135Sm, 136Sm, 137Sm, 138Sm, 139Sm, 140Sm, 141Sm, 142Sm, 143Sm, 145Sm, 146Sm, 147Sm, 148Sm, 151Sm, 153Sm, 155Sm, 156Sm, 157Sm, 158Sm, 159Sm, 160Sm, 161Sm, 162Sm, 163Sm, 164Sm, 165Sm