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Periodic Table Element Comparison: Compare Elements - Helium vs Holmium

Compare Helium and Holmium

Compare Helium and Holmium 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 Holmium with most reliable information about their properties, attributes, facts, uses etc. You can compare He vs Ho 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
Holmium
67
Ho
164.93032
Solid
Silver
lanthanide
N/A
 
6
f
[Xe] 4f11 6s2
1474 °C
2700 °C
2, 8, 18, 29, 8, 2
CAS7440-60-0
Neighborhood Elements of Holmium

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 Holmium was discovered by Marc Delafontaine in year 1878 in Switzerland. Holmium derived its name derived its name from from Holmia, the New Latin name for Stockholm

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%
None
5.9×10-6%
1.2e-06
2.2×10-11%
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
226 pm
18.752736782263 cm3
N/A
N/A
65
holmium Spectrum
357.73, 357.73, 561.58 pm
π/2, π/2, 2 π/3
P63/mmc
194

Simple Hexagonal

holmium 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
67
67
67
164.93032
97.93032
2, 8, 18, 29, 8, 2
[Xe] 4f11 6s2
4f11 6s2
 2;3
4I15/2
holmium Shells

Isotopes - Nuclear Properties

Isotopes
Naturally occurring stable isotopes:
3He, 4He.
Naturally occurring stable isotopes:
165Ho.

Chemical Properties: Ionization Energies and electron affinity

0
N/A
0 kJ/mol
2372.3, 5250.5 kJ/mol
3
1.23
50 kJ/mol
581, 1140, 2204, 4.1×103 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
8.795 g/cm3
18.752736782263

 

65 GPa
26 GPa
40 GPa
0.23


 

N/A
481 MPa
746 MPa

 

1.1×106 S/m
9.4×10-7 m Ω
N/A

 

16 W/(m K)
0.0000112 K-1

 

Paramagnetic
20 K
5.49×10-6
9.05467×10-7
0.0482845

 

N/A

 

2760 m/s

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
1474 °C
2700 °C
N/A
N/A

 

17 kJ/mol
265 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
CAS7440-60-0
N/A
4.1
3089
N/A
N/A
N/A
N/A
N/A

 

N/A
N/A