Pr Praseodymium – Element Information, Facts, Properties, Trends,Uses, Comparison with other elements

59
Pr
Praseodymium

Praseodymium

Element 59 of Periodic table is Praseodymium with atomic number 59, atomic weight 140.90765. Praseodymium, symbol Pr, has a Simple Hexagonal structure and Silver color. Praseodymium is a lanthanide element. Know everything about Praseodymium Facts, Physical Properties, Chemical Properties, Electronic configuration, Atomic and Crystal Structure.

59 Pr - Praseodymium | SchoolMyKids

Praseodymium is a chemical element with symbol Pr and atomic number 59. Praseodymium is a soft, silvery, malleable and ductile metal in the lanthanide group. It is valued for its magnetic, electrical, chemical, and optical properties.

How to Locate Praseodymium on Periodic Table

Periodic table is arranged by atomic number, number of protons in the nucleus which is same as number of electrons. The atomic number increases from left to right. Periodic table starts at top left ( Atomic number 1) and ends at bottom right (atomic number 118). Therefore you can directly look for atomic number 59 to find Praseodymium on periodic table.

Another way to read periodic table and locate an element is by using group number (column) and period number (row). To locate Praseodymium on periodic table look for cross section of group N/A and period 6 in the modern periodic table.

Table of Contents

Praseodymium History

The element Praseodymium was discovered by Carl Auer von Welsbach in year 1885 in Austria . Praseodymium derived its name from the Greek praseios didymos meaning 'green twin'

Praseodymium Presence: Abundance in Nature and Around Us

The table below shows the abundance of Praseodymium in Universe, Sun, Meteorites, Earth's Crust, Oceans and Human Body.

  Ppb by weight (1ppb =10^-7 %)
Abundance in Universe 2×10-7%
Abundance in Sun 1×10-7%
Abundance in Meteorites 9.8×10-6%
Abundance in Earth's Crust 8.6e-06
Abundance in Oceans 6×10-11%
Abundance in Humans N/A

Crystal Structure of Praseodymium

The solid state structure of Praseodymium is Simple Hexagonal.

The Crystal structure can be described in terms of its unit Cell. The unit Cells repeats itself in three dimensional space to form the structure.

Unit Cell Parameters

The unit cell is represented in terms of its lattice parameters, which are the lengths of the cell edges Lattice Constants (a, b and c)

a b c
367.25 367.25 1183.54 pm

and the angles between them Lattice Angles (alpha, beta and gamma).

alpha beta gamma
π/2 π/2 2 π/3

The positions of the atoms inside the unit cell are described by the set of atomic positions ( xi, yi, zi) measured from a reference lattice point.

The symmetry properties of the crystal are described by the concept of space groups. All possible symmetric arrangements of particles in three-dimensional space are described by the 230 space groups (219 distinct types, or 230 if chiral copies are considered distinct.

Space Group Name P63/mmc 59 Pr Praseodymium - Crystal Structure | SchoolMyKids
Space Group Number 194
Crystal Structure Simple Hexagonal

Praseodymium Atomic and Orbital Properties

Praseodymium atoms have 59 electrons and the electronic shell structure is [2, 8, 18, 21, 8, 2] with Atomic Term Symbol (Quantum Numbers) 4I9/2.

Atomic Number 59
Number of Electrons (with no charge) 59
Number of Protons 59
Mass Number 141
Number of Neutrons 82
Shell structure (Electrons per energy level) [2, 8, 18, 21, 8, 2]
Electron Configuration [Xe] 4f3 6s2
Valence Electrons 4f3 6s2
Oxidation State 2;3;4;5
Atomic Term Symbol (Quantum Numbers) 4I9/2

Shell Structure of Praseodymium - Electrons per energy level

59 Pr Praseodymium - Electron Shell Structure | SchoolMyKids
n s p d f
1 K 2
2 L 2 6
3 M 2 6 10
4 N 2 6 10 3
5 O 2 6
6 P 2

Ground State Electronic Configuration of Praseodymium - neutral Praseodymium atom

The ground state electronic configuration of Neutral Praseodymium atom is [Xe] 4f3 6s2. The portion of Praseodymium configuration that is equivalent to the noble gas of the preceding period, is abbreviated as [Xe]. For atoms with many electrons, this notation can become lengthy and so an abbreviated notation is used.This is important as it is the Valence electrons 4f3 6s2, electrons in the outermost shell that determine the chemical properties of the element.

Unabbreviated electronic configuration of neutral Praseodymium

Complete ground state electronic configuration for the Praseodymium atom, Unabbreviated electronic configuration

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f3 6s2

Atomic Structure of Praseodymium

Praseodymium atomic radius is 247 pm, while it's covalent radius is N/A.

Atomic Radius

247 pm (2.47 Å)

Atomic Volume 21.2210316265 cm3
Covalent Radius N/A
Van der Waals Radius N/A
Neutron Cross Section 11.4 σa/barns

Atomic Spectrum of Praseodymium

Atomic Spectrum of Praseodymium | SchoolMyKids

Praseodymium Chemical Properties: Praseodymium Ionization Energies and electron affinity

The electron affinity of Praseodymium is 50 kJ/mol

Valence 4
Electronegativity 1.13
ElectronAffinity 50 kJ/mol

Ionization Energy of Praseodymium

Refer to table below for Ionization energies of Praseodymium

Ionization energy number Enthalpy - kJ/mol
1 527
2 1020
3 2086
4 3761
5 5551

Praseodymium Physical Properties

Refer to below table for Praseodymium Physical Properties

Density 6.64 g/cm3
Molar Volume 21.2210316265 cm3

Elastic Properties

Young Modulus 37 GPa
Shear Modulus 15 GPa
Bulk Modulus 29 GPa
Poisson Ratio 0.28

Hardness of Praseodymium - Tests to Measure of Hardness of Element

Mohs Hardness N/A
Vickers Hardness 400 MPa
Brinell Hardness 481 MPa

Praseodymium Electrical Properties

Praseodymium is Conductor of electricity. Refer to table below for the Electrical properties of Praseodymium

Electrical Conductivity 1.4×106 S/m
Resistivity 7×10-7 m Ω
Superconducting Point N/A

Praseodymium Heat and Conduction Properties

Thermal Conductivity 13 W/(m K)
Thermal Expansion 6.7×10-6 K-1

Praseodymium Magnetic Properties

Magnetic Type Paramagnetic
Curie Point N/A
Mass Magnetic Susceptibility 4.23×10-7
Molar Magnetic Susceptibility 5.9604×10-8
Volume Magnetic Susceptibility 0.0028087

Optical Properties of Praseodymium

Refractive Index N/A

Acoustic Properties of Praseodymium

Speed of Sound 2280 m/s

Praseodymium Thermal Properties - Enthalpies and thermodynamics

Refer to table below for Thermal properties of Praseodymium

Melting Point 1204 K (931 °C)
Boiling Point 3563 K (3290 °C)
Critical Temperature N/A
Superconducting Point N/A

Enthalpies of Praseodymium

Heat of Fusion 6.9 kJ/mol
Heat of Vaporization 330 kJ/mol
Heat of Combustion N/A

Praseodymium Isotopes - Nuclear Properties of Praseodymium

Isotopes of rhodium. Naturally occurring Praseodymium has 1 stable isotope - 141Pr.

Isotope Isotope Mass % Abundance T half Decay Mode
121Pr  
122Pr  
123Pr  
124Pr  
125Pr  
126Pr  
127Pr  
128Pr  
129Pr  
130Pr  
131Pr  
132Pr  
133Pr  
134Pr  
135Pr  
136Pr  
137Pr  
138Pr  
139Pr  
140Pr  
141Pr   100% Stable N/A
142Pr  
143Pr  
144Pr  
145Pr  
146Pr  
147Pr  
148Pr  
149Pr  
150Pr  
151Pr  
152Pr  
153Pr  
154Pr  
155Pr  
156Pr  
157Pr  
158Pr  
159Pr  

Regulatory and Health - Health and Safety Parameters and Guidelines

CAS Number CAS7440-10-0
RTECS Number N/A
DOT Hazard Class N/A
DOT Numbers N/A
EU Number N/A
NFPA Fire Rating N/A
NFPA Hazards N/A
NFPA Health Rating N/A
NFPA Reactivity Rating N/A
Autoignition Point N/A
Flashpoint N/A

Database Search

List of unique identifiers to search the element in various chemical registry databases

Database Identifier number
CAS Number - Chemical Abstracts Service (CAS) CAS7440-10-0
CID Number CID23942
Gmelin Number N/A
NSC Number N/A
RTECS Number N/A

List of Elements
1 H - Hydrogen
2 He - Helium
3 Li - Lithium
4 Be - Beryllium
5 B - Boron
6 C - Carbon
7 N - Nitrogen
8 O - Oxygen
9 F - Fluorine
10 Ne - Neon
11 Na - Sodium
12 Mg - Magnesium
13 Al - Aluminium
14 Si - Silicon
15 P - Phosphorus
16 S - Sulfur
17 Cl - Chlorine
18 Ar - Argon
19 K - Potassium
20 Ca - Calcium
21 Sc - Scandium
22 Ti - Titanium
23 V - Vanadium
24 Cr - Chromium
25 Mn - Manganese
26 Fe - Iron
27 Co - Cobalt
28 Ni - Nickel
29 Cu - Copper
30 Zn - Zinc
31 Ga - Gallium
32 Ge - Germanium
33 As - Arsenic
34 Se - Selenium
35 Br - Bromine
36 Kr - Krypton
37 Rb - Rubidium
38 Sr - Strontium
39 Y - Yttrium
40 Zr - Zirconium
41 Nb - Niobium
42 Mo - Molybdenum
43 Tc - Technetium
44 Ru - Ruthenium
45 Rh - Rhodium
46 Pd - Palladium
47 Ag - Silver
48 Cd - Cadmium
49 In - Indium
50 Sn - Tin
51 Sb - Antimony
52 Te - Tellurium
53 I - Iodine
54 Xe - Xenon
55 Cs - Cesium
56 Ba - Barium
57 La - Lanthanum
58 Ce - Cerium
59 Pr - Praseodymium
60 Nd - Neodymium
61 Pm - Promethium
62 Sm - Samarium
63 Eu - Europium
64 Gd - Gadolinium
65 Tb - Terbium
66 Dy - Dysprosium
67 Ho - Holmium
68 Er - Erbium
69 Tm - Thulium
70 Yb - Ytterbium
71 Lu - Lutetium
72 Hf - Hafnium
73 Ta - Tantalum
74 W - Tungsten
75 Re - Rhenium
76 Os - Osmium
77 Ir - Iridium
78 Pt - Platinum
79 Au - Gold
80 Hg - Mercury
81 Tl - Thallium
82 Pb - Lead
83 Bi - Bismuth
84 Po - Polonium
85 At - Astatine
86 Rn - Radon
87 Fr - Francium
88 Ra - Radium
89 Ac - Actinium
90 Th - Thorium
91 Pa - Protactinium
92 U - Uranium
93 Np - Neptunium
94 Pu - Plutonium
95 Am - Americium
96 Cm - Curium
97 Bk - Berkelium
98 Cf - Californium
99 Es - Einsteinium
100 Fm - Fermium
101 Md - Mendelevium
102 No - Nobelium
103 Lr - Lawrencium
104 Rf - Rutherfordium
105 Db - Dubnium
106 Sg - Seaborgium
107 Bh - Bohrium
108 Hs - Hassium
109 Mt - Meitnerium
110 Ds - Darmstadtium
111 Rg - Roentgenium
112 Cn - Copernicium
113 Nh - Nihonium
114 Fl - Flerovium
115 Mc - Moscovium
116 Lv - Livermorium
117 Ts - Tennessine
118 Og - Oganesson
Metalloid
Nonmetals
Other Nonmetals
Halogens Noble Gas
Metals
Alkali Metals Alkaline Earth Metals
Transition Metals Post-Transition Metals
Lanthanide Actinide