Lanthanide

Praseodymium

Praseodymium (Pr) has atomic number 59. PubChem classifies it as lanthanide.

Atomic number

59

Symbol

Pr

Atomic weight (source value)

140.90766

Electron configuration

[Xe]6s2 4f3

Standard state

Solid

Electronegativity (Pauling)

1.13

Melting point (K)

1204

Boiling point (K)

3793

Density (g/cm³)

6.77

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.