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Periodic Table Element Comparison: Compare Elements - Helium vs Radium

Compare Helium and Radium

Compare Helium and Radium 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 Radium with most reliable information about their properties, attributes, facts, uses etc. You can compare He vs Ra 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
Radium
88
Ra
226
Solid
Silver
alkaline earth metal
2
beryllium family 
7
s
[Rn] 7s2
700 °C
1737 °C
2, 8, 18, 32, 18, 8, 2
CAS7440-14-4
Neighborhood Elements of Radium

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 Radium was discovered by Pierre Curie in year 1898 in France. Radium derived its name derived its name from from the Latin radius, 'ray'

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
N/A
N/A
N/A
9.9×10-12%
1×10-15%
1×10-13%

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
N/A
45.2 cm3
N/A
N/A
20
radium Spectrum
514.8, 514.8, 514.8 pm
π/2, π/2, π/2
Im_ 3m
229

Body Centered Cubic

radium 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
88
88
88
226
138
2, 8, 18, 32, 18, 8, 2
[Rn] 7s2
7s2
 2
1S0
radium Shells

Isotopes - Nuclear Properties

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

Chemical Properties: Ionization Energies and electron affinity

0
N/A
0 kJ/mol
2372.3, 5250.5 kJ/mol
2
0.9
N/A
509.3, 979 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 g/cm3
45.2

 

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


 

N/A
N/A
N/A

 

1×106 S/m
1×10-6 m Ω
N/A

 

19 W/(m K)
N/A

 

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

 

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
700 °C
1737 °C
N/A
N/A

 

8 kJ/mol
125 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
CAS7440-14-4
N/A
N/A
N/A
EU231-122-4
N/A
N/A
N/A
N/A

 

N/A
N/A

Compare With Other Elements