;

Periodic Table Element Comparison: Compare Elements - Neodymium vs Promethium

Compare Neodymium and Promethium

Compare Neodymium and Promethium on the basis of their properties, attributes and periodic table facts. Compare elements on more than 90 properties. All the elements of similar categories show a lot of similarities and differences in their chemical, atomic, physical properties and uses. These similarities and dissimilarities should be known while we study periodic table elements. You can study the detailed comparison between Neodymium vs Promethium with most reliable information about their properties, attributes, facts, uses etc. You can compare Nd vs Pm on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more.

Facts

Neodymium
60
Nd
144.24
Solid
Silver
lanthanide
N/A
 
6
f
[Xe] 4f4 6s2
1021 °C
3.1×103 °C
2, 8, 18, 22, 8, 2
CAS7440-00-8
Neighborhood Elements of Neodymium
Promethium
61
Pm
145
Solid
Silver
lanthanide
N/A
 
6
f
[Xe] 4f5 6s2
1.1×103 °C
3×103 °C
2, 8, 18, 23, 8, 2
CAS7440-12-2
Neighborhood Elements of Promethium

History

History
The element Neodymium was discovered by Carl Auer von Welsbach in year 1885 in Austria. Neodymium derived its name from from the Greek neos didymos meaning 'new twin'
The element Promethium was discovered by Chien Shiung Wu in year 1945 in United States. Promethium derived its name derived its name from from Prometheus of Greek mythology who stole fire from the Gods and gave it to humans

Presence: Abundance in Nature and Around Us

Ppb by weight (1ppb =10^-7 %)
1×10-6%
3×10-7%
5e-07
3.3e-05
2.8×10-10%
N/A
N/A
None
None
None
None
None

Crystal Structure and Atomic Structure

206 pm
20.576319543509 cm3
N/A
N/A
49
neodymium Spectrum
365.8, 365.8, 1179.9 pm
π/2, π/2, 2 π/3
P63/mmc
194

Simple Hexagonal

neodymium Crystal Structure
205 pm
19.961453744493 cm3
N/A
N/A
8×103
promethium Spectrum
N/A
N/A
N/A
N/A

Simple Hexagonal

promethium Crystal Structure

Atomic and Orbital Properties

Atomic Number
Number of Electrons (with no charge)
Number of Protons
Mass Number
Number of Neutrons
Shell structure (Electrons per energy level)
Electron Configuration
Valence Electrons
Oxidation State
Atomic Term Symbol (Quantum Numbers)
Shell structure
60
60
60
144.24
84.24
2, 8, 18, 22, 8, 2
[Xe] 4f4 6s2
4f4 6s2
 2;3;4
5I4
neodymium Shells
61
61
61
145
84
2, 8, 18, 23, 8, 2
[Xe] 4f5 6s2
4f5 6s2
 2;3
6H5/2
promethium Shells

Isotopes - Nuclear Properties

Isotopes
Naturally occurring stable isotopes:
142Nd, 143Nd, 145Nd, 146Nd, 148Nd.
Naturally occurring stable isotopes:
None.

Chemical Properties: Ionization Energies and electron affinity

3
1.14
50 kJ/mol
533.1, 1040, 2130, 3.9×103 kJ/mol
3
N/A
50 kJ/mol
540, 1050, 2150, 3970 kJ/mol

Physical Properties

7.01 g/cm3
20.576319543509

 

41 GPa
16 GPa
32 GPa
0.28


 

N/A
343 MPa
265 MPa

 

1.6×106 S/m
6.4×10-7 m Ω
N/A

 

17 W/(m K)
9.6×10-6 K-1

 

Paramagnetic
N/A
4.8×10-7
6.9235×10-8
0.0033648

 

N/A

 

2330 m/s
7.264 g/cm3
19.961453744493

 

46 GPa
18 GPa
33 GPa
0.28


 

N/A
N/A
N/A

 

1.3×106 S/m
7.5×10-7 m Ω
N/A

 

15 W/(m K)
0.000011 K-1

 

N/A
N/A
N/A
N/A
N/A

 

N/A

 

N/A

Thermal Properties - Enthalpies and thermodynamics

1021 °C
3.1×103 °C
N/A
N/A

 

7.1 kJ/mol
285 kJ/mol
N/A
1.1×103 °C
3×103 °C
N/A
N/A

 

7.7 kJ/mol
290 kJ/mol
N/A

Regulatory and Health - Health and Safety Parameters and Guidelines

CAS7440-00-8
RTECSQO8575000
N/A
N/A
N/A
N/A
N/A
N/A
N/A

 

N/A
N/A
CAS7440-12-2
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A

 

N/A
N/A