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Periodic Table Element Comparison: Compare Elements - Promethium vs Erbium

Compare Promethium and Erbium

Compare Promethium and Erbium 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 Promethium vs Erbium with most reliable information about their properties, attributes, facts, uses etc. You can compare Pm vs Er on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more.

Facts

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
Erbium
68
Er
167.259
Solid
Silver
lanthanide
N/A
 
6
f
[Xe] 4f12 6s2
1497 °C
2868 °C
2, 8, 18, 30, 8, 2
CAS7440-52-0
Neighborhood Elements of Erbium

History

History
The element Promethium was discovered by Chien Shiung Wu in year 1945 in United States. Promethium derived its name from from Prometheus of Greek mythology who stole fire from the Gods and gave it to humans
The element Erbium was discovered by Carl Gustaf Mosander in year 1842 in Sweden. Erbium derived its name derived its name from from Ytterby, Sweden

Presence: Abundance in Nature and Around Us

Ppb by weight (1ppb =10^-7 %)
N/A
None
None
None
None
None
2×10-7%
1×10-7%
1.8e-07
3e-06
9×10-11%
N/A

Crystal Structure and Atomic 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
226 pm
18.449040370615 cm3
N/A
N/A
165
erbium Spectrum
355.88, 355.88, 558.74 pm
π/2, π/2, 2 π/3
P63/mmc
194

Simple Hexagonal

erbium 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
61
61
61
145
84
2, 8, 18, 23, 8, 2
[Xe] 4f5 6s2
4f5 6s2
 2;3
6H5/2
promethium Shells
68
68
68
167.259
99.259
2, 8, 18, 30, 8, 2
[Xe] 4f12 6s2
4f12 6s2
 2;3
3H6
erbium Shells

Isotopes - Nuclear Properties

Isotopes
Naturally occurring stable isotopes:
None.
Naturally occurring stable isotopes:
162Er, 164Er, 166Er, 167Er, 168Er, 170Er.

Chemical Properties: Ionization Energies and electron affinity

3
N/A
50 kJ/mol
540, 1050, 2150, 3970 kJ/mol
3
1.24
50 kJ/mol
589.3, 1150, 2194, 4120 kJ/mol

Physical Properties

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
9.066 g/cm3
18.449040370615

 

70 GPa
28 GPa
44 GPa
0.24


 

N/A
589 MPa
814 MPa

 

1.2×106 S/m
8.6×10-7 m Ω
N/A

 

15 W/(m K)
0.0000122 K-1

 

Paramagnetic
32 K
3.77×10-6
6.30566×10-7
0.0341788

 

N/A

 

2830 m/s

Thermal Properties - Enthalpies and thermodynamics

1.1×103 °C
3×103 °C
N/A
N/A

 

7.7 kJ/mol
290 kJ/mol
N/A
1497 °C
2868 °C
N/A
N/A

 

19.9 kJ/mol
285 kJ/mol
N/A

Regulatory and Health - Health and Safety Parameters and Guidelines

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

 

N/A
N/A
CAS7440-52-0
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A

 

N/A
N/A