Sm
INTRODUCTION
Samarium is a hard, brittle, lustrous metallic element, and one of the rare earth elements in the lanthanide series. Its name was derive from its mineral element, 'samarskite'.
It is about 40th in order of abundance of the elements in Earth's crust. Samarium forms chiefly trivalent compounds; the salts are pale yellow in color.
BASIC INFORMATIONS
- Atomic Number
- 62
- Atomic Mass
- 150.36
- Atomic radius
- 0.166
- Ionization energy
- 1st,2nd,3rd (3898)
- Electronic config
- 2,8,18,24,8,2
- Principal Valency
- +2
- Density g/cm³
- 7.54
- Melting point °C
- 1072
- Boiling point °C
- 1794
- Type of Element
- Metal
- Electronegativity
- N/A
- Element Category
- Lanthanide series
- Appearance
- silvery gray solid
- Block
- f-block
- Period
- 8
- Group
- 9
- No of Isotopes
- 38
- Occurrence
- combine form
- Abundance in ppm
- 7
- Year of Discovery
- 1879
EXTRACTION
It is obtain by ion exchange process
OXIDATION STATES
+4,+3,+2,+1 (Mildly basic)
MAJOR SOURCE
Samarskite, Monazit, Bastnasite, Cerite
EXAMPLES OF COMPOUND PRESENT
Samarium oxide
ECONOMIC IMPORTANCE
* Cobalt-Samarium, produce permanent magnets that are far superior to most of the varieties now on the market.
* Samarium oxide is used in the control rods of some nuclear reactors.
