67
Ho
Holmium
Lanthanide period 6 f-block discovered: 1878
As a chemical element
Properties of the atom — they do not depend on what substance it is part of.
- Atomic number
- 67
- Atomic mass
- 164.93033 a.m.u.
- Electron configuration
- [Xe]6s2 4f11
- Electronegativity
- 1.23 on the Pauling scale
- Atomic radius
- 216 pm
- Ionization energy
- 6.022 eV
- Oxidation states
- +3
As a simple substance
Properties of the substance these atoms form under ordinary conditions.
- State at 25 °C
- Solid
- Melting point
- 1747 K (1 473,85 °C)
- Boiling point
- 2973 K (2 699,85 °C)
- Density
- 8.80 g/cm³