Lanthanide

Holmium

Holmium (Ho) has atomic number 67. PubChem classifies it as lanthanide.

Atomic number

67

Symbol

Ho

Atomic weight (source value)

164.93033

Electron configuration

[Xe]6s2 4f11

Standard state

Solid

Electronegativity (Pauling)

1.23

Melting point (K)

1747

Boiling point (K)

2973

Density (g/cm³)

8.80

Oxidation states

+3

Understanding this entry

Atomic number is the number of protons in the nucleus. Properties are reference values and may depend on conditions and measurement conventions. An atomic weight is not the mass of every isotope. For elements without a standard atomic weight, a source may report an isotope mass number. Blank source values are shown as unavailable rather than estimated.

Further reading and reference: NIH PubChem source dataset ↗. Values and educational summaries are not a substitute for specialised advice.