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Periodic Table Element Comparison: Compare Elements - Helium vs Protactinium

Compare Helium and Protactinium

Compare Helium and Protactinium 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 Protactinium with most reliable information about their properties, attributes, facts, uses etc. You can compare He vs Pa 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
Protactinium
91
Pa
231.03588
Solid
Silver
actinide
N/A
 
7
f
[Rn] 5f2 6d1 7s2
1572 °C
4000 °C
2, 8, 18, 32, 20, 9, 2
CAS7440-13-3
Neighborhood Elements of Protactinium

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 Protactinium was discovered by William Crookes in year 1913 in Germany and United Kingdom. Protactinium derived its name derived its name from from the Greek protos, 'first', and actinium, which is produced through the radioactive decay of protactinium

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
9.9×10-13%
2×10-23%
None

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
180 pm
15.03161223162 cm3
N/A
N/A
500
protactinium Spectrum
392.5, 392.5, 323.8 pm
π/2, π/2, π/2
I4/mmm
139

Centered Tetragonal

protactinium 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
91
91
91
231.03588
140.03588
2, 8, 18, 32, 20, 9, 2
[Rn] 5f2 6d1 7s2
5f2 6d1 7s2
 3;4;5
4K11/2
protactinium 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
5
1.5
N/A
568 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
15.37 g/cm3
15.03161223162

 

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


 

N/A
N/A
N/A

 

5.6×106 S/m
1.8×10-7 m Ω
1.4

 

47 W/(m K)
N/A

 

Paramagnetic
N/A
3.25×10-8
7.509×10-9
0.0004995

 

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
1572 °C
4000 °C
N/A
1.4

 

15 kJ/mol
470 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
CAS7440-13-3
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A

 

N/A
N/A