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Periodic Table Element Comparison: Compare Elements - Fermium vs Helium

Compare Fermium and Helium

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

Facts

Fermium
100
Fm
257
Solid
N/A
actinide
N/A
 
7
f
[Rn] 5f12 7s2
1527 °C
N/A
2, 8, 18, 32, 30, 8, 2
CAS7440-72-4
Neighborhood Elements of Fermium
Helium
2
He
4.002602
Gas
Colorless
noble gas
18
helium family or neon family 
1
p
1s2
N/A
-268.93 °C
2
CAS7440-59-7
Neighborhood Elements of Helium

History

History
The element Fermium was discovered by Lawrence Berkeley National Laboratory in year 1952 in United States. Fermium derived its name from from Enrico Fermi, physicist
The element Helium was discovered by Pierre Janssen in year 1895 in Sweden and United Kingdom. Helium derived its name derived its name from from the Greek word helios, meaning 'sun'

Presence: Abundance in Nature and Around Us

Ppb by weight (1ppb =10^-7 %)
N/A
None
None
None
None
None
0.23
0.23
N/A
5.5×10-7%
7.2×10-10%
N/A

Crystal Structure and Atomic Structure

N/A
N/A cm3
N/A
N/A
5.8×103
fermium Spectrum
N/A
N/A
N/A
N/A

Body Centered Cubic

fermium Crystal Structure
31 pm
22.423540616247 cm3
32 pm
140 pm
0.007
helium Spectrum
424.2, 424.2, 424.2 pm
π/2, π/2, π/2
Fm_ 3m
225

Face Centered Cubic

helium 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
100
100
100
257
157
2, 8, 18, 32, 30, 8, 2
[Rn] 5f12 7s2
5f12 7s2
 2;3
3H6
fermium Shells
2
2
2
4.002602
2.002602
2
1s2
1s2
 
1S0
helium Shells

Isotopes - Nuclear Properties

Isotopes
Naturally occurring stable isotopes:
None.
Naturally occurring stable isotopes:
3He, 4He.

Chemical Properties: Ionization Energies and electron affinity

3
1.3
N/A
627 kJ/mol
0
N/A
0 kJ/mol
2372.3, 5250.5 kJ/mol

Physical Properties

N/A
N/A

 

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


 

N/A
N/A
N/A

 

N/A
N/A
N/A

 

N/A
N/A

 

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

 

N/A

 

N/A
0.1785 g/l
22.423540616247

 

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


 

N/A
N/A
N/A

 

N/A
N/A
N/A

 

0.1513 W/(m K)
N/A

 

Diamagnetic
N/A
-5.9×10-9
-2.36×10-11
-1.05×10-9

 

1.000035

 

970 m/s

Thermal Properties - Enthalpies and thermodynamics

1527 °C
N/A
N/A
N/A

 

N/A
N/A
N/A
N/A
-268.93 °C
5.19 K
N/A

 

0.02 kJ/mol
0.083 kJ/mol
N/A

Regulatory and Health - Health and Safety Parameters and Guidelines

CAS7440-72-4
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A

 

N/A
N/A
CAS7440-59-7
RTECSMH6520000
2.2
1963
N/A
0
N/A
1
0

 

N/A
N/A