;

Periodic Table Element Comparison: Compare Elements - Helium vs Lanthanum

Compare Helium and Lanthanum

Compare Helium and Lanthanum 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 Lanthanum with most reliable information about their properties, attributes, facts, uses etc. You can compare He vs La 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
Lanthanum
57
La
138.9055
Solid
Silver
lanthanide
N/A
 
6
f
[Xe] 5d1 6s2
920 °C
3464 °C
2, 8, 18, 18, 9, 2
CAS7439-91-0
Neighborhood Elements of Lanthanum

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 Lanthanum was discovered by Carl Gustaf Mosander in year 1839 in Sweden. Lanthanum derived its name derived its name from from the Greek lanthanein, meaning 'to lie hidden'

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
2×10-7%
2×10-7%
2.8e-07
3.4e-05
3.4×10-10%
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
195 pm
22.600959973967 cm3
169 pm
N/A
8.98
lanthanum Spectrum
377.2, 377.2, 1214.4 pm
π/2, π/2, 2 π/3
P63/mmc
194

Simple Hexagonal

lanthanum 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
57
57
57
138.9055
81.9055
2, 8, 18, 18, 9, 2
[Xe] 5d1 6s2
5d1 6s2
 1;2;3
2D3/2
lanthanum Shells

Isotopes - Nuclear Properties

Isotopes
Naturally occurring stable isotopes:
3He, 4He.
Naturally occurring stable isotopes:
139La.

Chemical Properties: Ionization Energies and electron affinity

0
N/A
0 kJ/mol
2372.3, 5250.5 kJ/mol
3
1.1
48 kJ/mol
538.1, 1067, 1850.3, 4819, 5940 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
6.146 g/cm3
22.600959973967

 

37 GPa
14 GPa
28 GPa
0.28


 

2.5 MPa
491 MPa
363 MPa

 

1.6×106 S/m
6.1×10-7 m Ω
4.88

 

13 W/(m K)
0.0000121 K-1

 

Paramagnetic
N/A
1.1×10-8
1.528×10-9
6.761e-05

 

N/A

 

2475 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
920 °C
3464 °C
N/A
4.88

 

6.2 kJ/mol
400 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
CAS7439-91-0
N/A
4.1
3178
N/A
N/A
N/A
N/A
N/A

 

N/A
N/A