On this page I'll provide comprehensive data for Helium. I hope you profit from it.
Helium Overview
Name Origin
Greek: hêlios (sun).
Symbol
He (Helium)Description
Light, odorless, colorless, tasteless inert gas. Second most abundant element in the universe. Sixth most abundant in the earth's atmosphere.
Discovery
Discovered By: Sir William Ramsey, Nils Langet, P.T.Cleve
Year: 1895
Location: Scotland/Sweden
Sources
Found in natural gas deposits & in the air (5 parts per billion) Constantly lost to space; replenished by radioactive decay (alpha particles).
Uses
Used in balloons, deep sea diving & welding. Also used in very low temperature research.
State at 20 °C
gas
Group
Group Name: Noble GasÂ
Group in periodic table: 8a
Period in periodic table:Â 1
Atomic Number
2Learn more about the atomic number.
Atomic Mass
4,002602
Learn more about the atomic mass.
Stable Isotopes
He3percent abundance: .0001% He4 percent abundance 99.99%
Learn more about stable isotopes.
Radioactive Isotopes
He6, He8
Learn more about radioactive isotopes.
Atomic Structure
Crystalline Structure
Hexagonal
Learn more about crystalline structure
Shells
Electrons per energy level: 2
Learn more about electron shells
Electron Configuration
1s2
Learn more about electron configuration.
Abbreviated Configuration
1s2
Learn more about abbreviated electron configuration.
Valence Electrons
0
Learn more about valence electrons
Atom Size
Atomic Radius
0.49 Ã…
Learn more about atomic radius.
Covalent Radius
0.93 Ã…
Learn more about covalent radius.
Ionic Radius
--
Learn more about ionic radius.
Molar Volume
19.5 cm³/mol
Learn more about molar volume.
Chemical Properties
Common Oxidation States
First Ionization Energy
First Ionization Potential
Second Ionization Potential
Third Ionization Potential
Physical Properties
Density
Electrical Conductivity
Thermal Conductivity
Elastic Modulus
Coefficient of Thermal Expansion
| -- |
Learn more about coefficient of thermal expansion.
Heat Properties
Other heat related physical properties:
Melting Point
Boiling Point
Specific Heat
Heat of Vaporization
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Along with basic element information, it also comes with color coded info about: State (Gas, Liquid or Solid at room temperature), Groups/series details and much more...
How about an incentive to share this post? (You will help other colleagues find this blog)
Download and enjoy this complete and colored periodic table for you to edit and enjoy. It's in an editable excel format or .ods (open).
[lock][Download excel ##download##]
[Download open .ods format ##download##][/lock]
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