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Periodic Table Element Comparison: Compare Elements - Promethium vs Cesium

Compare Promethium and Cesium

Compare Promethium and Cesium 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 Cesium with most reliable information about their properties, attributes, facts, uses etc. You can compare Pm vs Cs 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
Cesium
55
Cs
132.90545
Solid
Silver
alkali metal
1
lithium family 
6
s
[Xe] 6s1
28.44 °C
671 °C
2, 8, 18, 18, 8, 1
CAS7440-46-2
Neighborhood Elements of Cesium

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 Cesium was discovered by Robert Bunsen in year 1860 in Germany. Cesium derived its name derived its name from from the Latin caesius, meaning 'sky blue'

Presence: Abundance in Nature and Around Us

Ppb by weight (1ppb =10^-7 %)
N/A
None
None
None
None
None
8×10-8%
8×10-7%
1.4e-07
1.9e-06
5×10-8%
2×10-6%

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
298 pm
70.732011708356 cm3
225 pm
N/A
29
cesium Spectrum
614.1, 614.1, 614.1 pm
π/2, π/2, π/2
Im_ 3m
229

Body Centered Cubic

cesium 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
55
55
55
132.90545
77.90545
2, 8, 18, 18, 8, 1
[Xe] 6s1
6s1
-1  1
2S1/2
cesium Shells

Isotopes - Nuclear Properties

Isotopes
Naturally occurring stable isotopes:
None.
Naturally occurring stable isotopes:
133Cs.

Chemical Properties: Ionization Energies and electron affinity

3
N/A
50 kJ/mol
540, 1050, 2150, 3970 kJ/mol
1
0.79
45.5 kJ/mol
375.7, 2234.3, 3.4×103 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
1.879 g/cm3
70.732011708356

 

1.7 GPa
N/A
1.6 GPa
N/A


 

0.2 MPa
N/A
0.14 MPa

 

5×106 S/m
2×10-7 m Ω
N/A

 

36 W/(m K)
N/A

 

Paramagnetic
N/A
2.8×10-9
3.72×10-10
5.26×10-6

 

N/A

 

N/A

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
28.44 °C
671 °C
1938 K
N/A

 

2.09 kJ/mol
65 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
CAS7440-46-2
RTECSFK9225000
4.3
1407
N/A
N/A
Water Reactive
N/A
N/A

 

N/A
N/A