Is praseodymium a metal?

Yes. Praseodymium is a metal, classified as a lanthanide on the periodic table.

How many protons does praseodymium have?

Praseodymium has 59 protons. Its atomic number is 59, which is also the number of electrons in a neutral atom of praseodymium.

What group and period is praseodymium in?

Praseodymium is in period 6 of the periodic table. As a lanthanide in the f-block, it sits in a separate row below the main table and has no standard group number.

What is the atomic mass of praseodymium?

The atomic mass of praseodymium is 140.91 u (unified atomic mass units).

Element 59

Praseodymium (Pr)

Lanthanide · Period 6 · f-block

Praseodymium (Pr) is element 59 of the periodic table, a lanthanide in period 6 (f-block) with an atomic mass of 140.91 and is a solid at standard conditions.

At a glance

Atomic number: 59
Symbol: Pr
Atomic mass: 140.91 u
Category: Lanthanides
Period: 6
Block: f-block
Phase at STP: solid

Electron structure

Electron configuration: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f3 5s2 5p6 6s2
Shorthand configuration: [Xe] 4f3 6s2
Electrons per shell: 2, 8, 18, 21, 8, 2
Oxidation states: +2, +3, +4, +5

Physical properties

Melting point: 1,208 K (934.85 °C)
Boiling point: 3,793 K (3,519.85 °C)
Density: 6.773 g/cm³
Phase: solid

Atomic properties

Electronegativity (Pauling): 1.13
Atomic radius: 247 pm
Covalent radius: 203 pm
First ionization energy: 527 kJ/mol
Electron affinity: 50 kJ/mol

Notable isotopes

Notable isotopes of Praseodymium: mass number, atomic mass, natural abundance, and stability.
Isotope	Mass	Abundance	Stability
Pr-141	140.90766	100%	Stable

Common uses

Magnets
Lasers
Arc lighting
Colorant for glass

Discovery

Year: 1885
Discovered by: Carl Auer von Welsbach
Country: Austria

Frequently asked questions

Is praseodymium a metal?: Yes. Praseodymium is a metal, classified as a lanthanide on the periodic table.
How many protons does praseodymium have?: Praseodymium has 59 protons. Its atomic number is 59, which is also the number of electrons in a neutral atom of praseodymium.
What group and period is praseodymium in?: Praseodymium is in period 6 of the periodic table. As a lanthanide in the f-block, it sits in a separate row below the main table and has no standard group number.
What is the atomic mass of praseodymium?: The atomic mass of praseodymium is 140.91 u (unified atomic mass units).

Keep exploring

Praseodymium's row is on the printable element property sheet, and its tile is on the periodic table wall chart - the same numbers as above, laid out for A4 or A3 paper.