Praseodymium Element (Periodic Table)

Praseodymium

Praseodymium (Pr) is a chemical element of the periodic table, located in the period 6, and has the atomic number 59. It is the third element in the lanthanide series. It is a soft, malleable, ductile, grayish-white metal, whose name comes from the Greek word “prasios didymos”, which means green twin. It is counted as one of the rare earth elements.

group
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
period
1
1
H
2
He
2
3
Li
4
Be
5
B
6
C
7
N
8
O
9
F
10
Ne
3
11
Na
12
Mg
13
Al
14
Si
15
P
16
S
17
Cl
18
Ar
4
19
K
20
Ca
21
Sc
22
Ti
23
V
24
Cr
25
Mn
26
Fe
27
Co
28
Ni
29
Cu
30
Zn
31
Ga
32
Ge
33
As
34
Se
35
Br
36
Kr
5
37
Rb
38
Sr
39
Y
40
Zr
41
Nb
42
Mo
43
Tc
44
Ru
45
Rh
46
Pd
47
Ag
48
Cd
49
In
50
Sn
51
Sb
52
Te
53
I
54
Xe
6
55
Cs
56
Ba
72
Hf
73
Ta
74
W
75
Re
76
Os
77
Ir
78
Pt
79
Au
80
Hg
81
Tl
82
Pb
83
Bi
84
Po
85
At
86
Rn
7
87
Fr
88
Ra
104
Rf
105
Db
106
Sg
107
Bh
108
Hs
109
Mt
110
Ds
111
Rg
112
Cn
113
Nh
114
Fl
115
Mc
116
Lv
117
Ts
118
Og
57
La
58
Ce
59
Pr
60
Nd
61
Pm
62
Sm
63
Eu
64
Gd
65
Tb
66
Dy
67
Ho
68
Er
69
Tm
70
Yb
71
Lu
89
Ac
90
Th
91
Pa
92
U
93
Np
94
Pu
95
Am
96
Cm
97
Bk
98
Cf
99
Es
100
Fm
101
Md
102
No
103
Lr
– f block

FAQs on Praseodymium Element

Praseodymium
‣ What does praseodymium look like?

Appearance: greyish white
‣ Who discovered praseodymium? When was praseodymium discovered?

Discovery: Carl Auer von Welsbach (1885)
‣ Location of praseodymium on the periodic table

Praseodymium Periodic Table

Location: Praseodymium is found in the sixth row of the periodic table, next to the cerium element.
‣ What is praseodymium atomic mass number?

Atomic number (Z): 59
‣ What is praseodymium symbol?

Symbol: Pr
‣ What is the atomic weight for praseodymium?

Standard atomic weight: 140.90766
‣ What is the block of praseodymium?

Block: f-block
‣ What period is praseodymium on the periodic table?

Period: 6
Praseodymium atomic radius: empirical: 182 pm
Praseodymium covalent radius: 203±7 pm
‣ What is the melting point of praseodymium?

Melting point: 1208 K (935 °C, 1715 °F)
Praseodymium boiling point: 3403 K (3130 °C, 5666 °F)
‣ How many shells does praseodymium have?

Electrons per shell: 2, 8, 18, 21, 8, 2
‣ What is the electron configuration of praseodymium?

Electron configuration: [Xe] 4f3 6s2
Praseodymium ionization energies:
1st: 527 kJ/mol
2nd: 1020 kJ/mol
3rd: 2086 kJ/mol
‣ Is praseodymium solid, liquid or gas at room temperature?

Phase (at r.t): solid
‣ What is praseodymium density?

Density (near r.t): 6.77 g/cm3
when liquid (at m.p): 6.50 g/cm3
Praseodymium magnetic ordering: paramagnetic
Praseodymium natural occurrence: primordial
‣ What is the oxidation state of praseodymium?

Oxidation state: +3, +4
‣ What’s the electronegativity of praseodymium?

Electronegativity: Pauling scale: 1.13
Praseodymium poisson’s ratio: α form: 0.281
Praseodymium heat of fusion: 6.89 kJ/mol
Praseodymium heat of vaporization: 331 kJ/mol
Praseodymium molar heat capacity: 27.20 J/(mol K)
Praseodymium molar magnetic susceptibility: +5010.0 × 10-6 cm3/mol (293 K)
Speed of sound in praseodymium: 2280 m/s (at 20 °C)
‣ What is the crystal structure of praseodymium?

Crystal structure: double hexagonal close-packed (dhcp)
Thermal expansion of praseodymium: α, poly: 6.7 µm/(m.K) (at r.t)
Thermal conductivity of praseodymium: 12.5 W/(m.K)
Praseodymium electrical resistivity: α, poly: 0.700 nΩ.m (at r.t)
‣ Praseodymium hardness

Vickers hardness: 250-745 MPa
Brinell hardness: 250-640 MPa
Young’s modulus of praseodymium: α form: 37.3 GPa
Shear modulus of praseodymium: α form: 14.8 GPa
Bulk modulus of praseodymium: α form: 28.8 GPa
Praseodymium CAS number: 7440-10-0

‣ Praseodymium vapor pressure

Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)17711973(2227)(2571)(3054)(3779)

‣ How many isotopes does praseodymium have?

Main isotopes of praseodymium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
141Pr100 %stable
142Prsyn19.12 hβ
ε
142Nd
142Ce
143Prsyn13.57 dβ143Nd

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