67
Ho
164.93
Holmium (Ho)
Element 67 · Period 6 · Lanthanide series
lanthanide
solid at room temp
f-block
About Holmium
Highest magnetic moment of any element. Used in magnets and medical lasers.
Physical Properties
Atomic Mass
164.93 u
State at 25°C
Solid
Melting Point
1461 °C
Boiling Point
2720 °C
Density
8.79 g/cm³
Magnetism
Paramagnetic
Atomic Properties
Electron Configuration
[Xe] 4f¹¹ 6s²
Electron Shells
2, 8, 18, 29, 8, 2
Electronegativity
1.23
Atomic Radius
226 pm
Ionization Energy
581 kJ/mol
Oxidation States
+3
Discovery & History
Discovered By
Marc Delafontaine
Discovery Year
1878
Named By
Per Teodor Cleve
Name origin: Latin: Holmia (Stockholm)
Frequently Asked Questions
- Is Holmium a metal, nonmetal, or metalloid?
- Holmium is classified as a lanthanide.
- What state is Holmium in at room temperature?
- Holmium is a solid at standard room temperature (25°C).
- What is the atomic mass of Holmium?
- Holmium has an atomic mass of 164.93 atomic mass units (u).
- Who discovered Holmium?
- Holmium was discovered by Marc Delafontaine in 1878.
- Where is Holmium on the periodic table?
- Holmium is element number 67, located in period 6, part of the lanthanide series shown below the main table.