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Periodic Table Element Comparison: Compare Elements - Helium vs Europium

Compare Helium and Europium

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

Facts

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
Europium
63
Eu
151.964
Solid
Silver
lanthanide
N/A
 
6
f
[Xe] 4f7 6s2
822 °C
1527 °C
2, 8, 18, 25, 8, 2
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Neighborhood Elements of Europium

History

History
The element Helium was discovered by Pierre Janssen in year 1895 in Sweden and United Kingdom. Helium derived its name from from the Greek word helios, meaning 'sun'
The element Europium was discovered by Eugène-Anatole Demarçay in year 1901 in France. Europium derived its name derived its name from from Europe

Presence: Abundance in Nature and Around Us

Ppb by weight (1ppb =10^-7 %)
0.23
0.23
N/A
5.5×10-7%
7.2×10-10%
N/A
5×10-8%
5×10-8%
5.9×10-6%
1.8e-06
1.3×10-11%
N/A

Crystal Structure and Atomic 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
231 pm
28.978642257818 cm3
N/A
N/A
4450
europium Spectrum
458.1, 458.1, 458.1 pm
π/2, π/2, π/2
Im_ 3m
229

Body Centered Cubic

europium 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
2
2
2
4.002602
2.002602
2
1s2
1s2
 
1S0
helium Shells
63
63
63
151.964
88.964
2, 8, 18, 25, 8, 2
[Xe] 4f7 6s2
4f7 6s2
 2;3
8S7/2
europium Shells

Isotopes - Nuclear Properties

Isotopes
Naturally occurring stable isotopes:
3He, 4He.
Naturally occurring stable isotopes:
151Eu, 153Eu.

Chemical Properties: Ionization Energies and electron affinity

0
N/A
0 kJ/mol
2372.3, 5250.5 kJ/mol
3
N/A
50 kJ/mol
547.1, 1085, 2404, 4120 kJ/mol

Physical Properties

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
5.244 g/cm3
28.978642257818

 

18 GPa
7.9 GPa
8.3 GPa
0.15


 

N/A
167 MPa
N/A

 

1.1×106 S/m
9×10-7 m Ω
N/A

 

14 W/(m K)
0.000035 K-1

 

Paramagnetic
N/A
2.76×10-7
4.1942×10-8
0.0014473

 

N/A

 

N/A

Thermal Properties - Enthalpies and thermodynamics

N/A
-268.93 °C
5.19 K
N/A

 

0.02 kJ/mol
0.083 kJ/mol
N/A
822 °C
1527 °C
N/A
N/A

 

9.2 kJ/mol
175 kJ/mol
N/A

Regulatory and Health - Health and Safety Parameters and Guidelines

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

 

N/A
N/A
CAS7440-53-1
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A

 

N/A
N/A