Elements
59

Pr

Praseodymium

Praseodymium (Pr) is a silvery white coloured metal that has the atomic number 59 in the periodic table. It is a Lanthanide metal. It has the symbol Pr.

Praseodymium is a soft malleable metal that is a rare eath metal. Praseodymium was first discovered along with samarium and in a substance called didymium which was mistaken as a new element. Didymium was identified as a mixture of elements and in 1885 Carl Welsbach identified both Praseodymium and Neodymium as two elements. Praseodymium is used in the creation of permanent magnets and generators for hybrid cars and wind turbines. It is not found as a free element but in ores. It is a solid metal at room temperature with a melting point of 935°c and a boiling point of 3520°c.

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FAQ's

What is the Melting Point for Praseodymium?

Praseodymium has a Melting Point of 931°F, meaning at 931°F it will turn to a liquid.

What is the Boiling Point for Praseodymium?

Praseodymium has a Boiling Point of 3520°F, meaning at 3520°F it will turn to a Gas.

What is the Electronegativity of Praseodymium?

Praseodymium's Electronegativty is 1.13. Electronegativity is a measure of how strongly atoms attract bonding electrons to themselves.

What is the Heat of Vaporization of Praseodymium?

Praseodymium has a Heat of Vaporization of 296.8 kJ/mol.

Uses

Used with neodymium to make lenses for glass maker's goggles since it filters out the yellow light present in glass blowing. Alloyed with magnesium creates a high-strength metal used in aircraft engines. Makes up 5% of Mich metal.

Sources

Obtained from same salts as neodymium.

59
Protons
59
Electrons
82
Neutrons

Pr

Element Symbol
Pr
Atomic Weight
140.908
Atomic Number
59
State
Solid
Melting Point
Unknown
931
°C
Boiling Point
3520
Unknown
°C
Heat of Vaporization
296.8
Unknown
kJ/mol
Crystal Structure
Hexagonal
Thermoconductivity
0.125
Unknown
W/cmK
Shells
2,8,18,21,8,2
Group
Lanthanide
Period
6
Block
F Block
Orbitals
[Xe] 4f3 6s2
Coefficient of Thermal Expansion
5.4 10^-6 K^-1
Covalent Radius
1.65 Å
Density at 293K
6.77 g/cm³
Electrical Conductivity
0.0148 10^6/cm ohm
First Ionization Potential
5.464 V
Second Ionization Potential
10.551 V
Third Ionization Potential
21.62 V
Ionic Radius
1.13 (+3) Å
Oxydation States
(3,4)
Lattice Parameter
3.6726 Å
Lattice Parameter 2
--
Lattice Parameter 3
a=23° 13'
Pronounced

pra-si-eh-DIM-i-em

Discovered by

C.F. Aver von Welsbach

Discovery date

1885

Orbital configuration
2,8,18,21,8,2

Download the Periodic Table

Explore Other Lanthanides

145
61

Pm

Promethium
164.93
67

Ho

Holmium
173.045
70

Yb

Ytterbium
138.905
57

La

Lanthanum
144.24
60

Nd

Neodymium
157.25
64

Gd

Gadolinium
167.259
68

Er

Erbium
140.116
58

Ce

Cerium
174.967
71

Lu

Lutetium
158.925
65

Tb

Terbium
150.36
62

Sm

Samarium
151.964
63

Eu

Europium
168.934
69

Tm

Thulium
162.5
66

Dy

Dysprosium
The lanthanide series contains 15 metallic elements from number 57 (lanthanum) to 71 (lutetium). They are located in group 3 and in the f-block of period six in the periodic table.
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Cerium

58
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Neodymium

60