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Periodic Table Element Comparison: Compare Elements - Helium vs Chlorine

Compare Helium and Chlorine

Compare Helium and Chlorine 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 Chlorine with most reliable information about their properties, attributes, facts, uses etc. You can compare He vs Cl 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
Chlorine
17
Cl
35.453
Gas
Yellow
halogens
17
fluorine family 
3
p
[Ne] 3s2 3p5
-101.5 °C
-34.04 °C
2, 8, 7
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Neighborhood Elements of Chlorine

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 Chlorine was discovered by Carl Wilhelm Scheele in year 1774 in Sweden. Chlorine derived its name derived its name from from the Greek word chloros, meaning 'greenish yellow'

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
1e-06
8e-06
0.00037
0.00017
0.02
0.0012

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
79 pm
11.030802738021 cm3
99 pm
175 pm
35.3
chlorine Spectrum
622.35, 445.61, 817.85 pm
π/2, π/2, π/2
Cmca
64

Base Centered Orthorhombic

chlorine 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
17
17
17
35.453
18.453
2, 8, 7
[Ne] 3s2 3p5
3s2 3p5
-1  1;2;3;4;5;6;7
2P3/2
chlorine Shells

Isotopes - Nuclear Properties

Isotopes
Naturally occurring stable isotopes:
3He, 4He.
Naturally occurring stable isotopes:
35Cl, 37Cl.

Chemical Properties: Ionization Energies and electron affinity

0
N/A
0 kJ/mol
2372.3, 5250.5 kJ/mol
5
3.16
349 kJ/mol
1251.2, 2298, 3822, 5158.6, 6542, 9362, 11018, 33604, 3.86×104, 43961 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
3.214 g/l
11.030802738021

 

N/A
N/A
1.1 GPa
N/A


 

N/A
N/A
N/A

 

0.01 S/m
100 m Ω
N/A

 

0.0089 W/(m K)
N/A

 

Diamagnetic
N/A
-7.2×10-9
-5.11×10-10
-2.31×10-8

 

1.000773

 

206 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
-101.5 °C
-34.04 °C
416.9 K
N/A

 

3.2 kJ/mol
10.2 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
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RTECSFO2100000
N/A
N/A
N/A
N/A
N/A
N/A
N/A

 

N/A
N/A