Ho
INTRODUCTION
Holmium is a silvery metallic element with an atomic number of 67, and is one of the most paramagnetic substances known. It is one of the least abundant of the rare earth metals, ranking 55th in order of abundance of the elements in Earth's crust.
It was named after the native city of Stockholm, Sweden , because the latinized name of Stockholm is Holmia.
BASIC INFORMATIONS
- Atomic Number
- 67
- Atomic Mass
- 164.93033
- Atomic radius
- 0.158
- Ionization energy
- 1st,2nd,3rd (3937)
- Electronic config
- 2,8,18,29,8,2
- Principal Valency
- +2
- Density g/cm³
- 8.80
- Melting point °C
- 1461
- Boiling point °C
- 2720
- Type of Element
- Metal
- Electronegativity
- N/A
- Element Category
- Lanthanide series
- Appearance
- Silvery solid
- Block
- f-block
- Period
- 8
- Group
- 14
- No of Isotopes
- 36
- Occurrence
- Combine form
- Abundance in ppm
- 1.3
- Year of Discovery
- 1878
EXTRACTION
It is obtain by ion exchange process
OXIDATION STATES
+3,+2,+1 (Weakly basic)
MAJOR SOURCE
Gadolinite, Monazite
EXAMPLES OF COMPOUND PRESENT
Holmium oxide, Holmium sulfate
ECONOMIC IMPORTANCE
* Holmium is used in some electronic devices and as a catalyst in industrial chemical reactions.
