On this page I'll provide comprehensive data for Selenium. I hope you profit from it.
Selenium Overview
Name Origin
Greek: selênê (moon).
Symbol
Se (Selenium)Description
Soft metalloid similar to sulfur. Ranges from gray metallic to red glassy appearance.
Discovery
Discovered By: Jöns Berzelius
Year: 1818
Location: Sweden
Sources
Obtained from lead, copper and nickel refining. Conducts electricity when struck by light.
Uses
Light causes it to conduct electricity more easily. It is used in photoelectric cells, TV cameras, xerography machines and as a semiconductor in solar batteries and rectifiers. Also colors glass red.
State at 20 °C
Solid
Group
Group Name: Non-MetalÂ
Group in periodic table: 6a
Period in periodic table:Â 4
Atomic Number
34Learn more about the atomic number.
Atomic Mass
78,96
Learn more about the atomic mass.
Stable Isotopes
Se74 percent abundance: .89% Se76 percent abundance: 9.37% Se77 percent abundance: 7.63% Se78 percent abundance: 23.77% Se80 percent abundance: 49.61% Se82 percent abundance: 8.73%
Learn more about stable isotopes.
Radioactive Isotopes
Se70-73, Se75, Se79, Se81, Se83-84
Learn more about radioactive isotopes.
Atomic Structure
Crystalline Structure
Hexagonal
Learn more about crystalline structure
Shells
Electrons per energy level: 2,8,18,6
Learn more about electron shells
Electron Configuration
1s2 2s2 2p6 3s2 3p6 4 s2 3 d10 4 p4
Learn more about electron configuration.
Abbreviated Configuration
[Ar] 3d10 4s2 4p4
Learn more about abbreviated electron configuration.
Valence Electrons
-2,4,6
Learn more about valence electrons
Atom Size
Atomic Radius
1.22 Ã…
Learn more about atomic radius.
Covalent Radius
1.16 Ã…
Learn more about covalent radius.
Ionic Radius
.50 (+4) Ã…
Learn more about ionic radius.
Molar Volume
16.45 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
0.32 J/gK
Learn more about specific heat.
Learn more about specific heat.
Heat of Fusion
6.694 kJ/mol
Learn more about heat of fusion.
Heat of Vaporization
Need an editable periodic table to edit? Maybe add your school logo, work team or anything else to maker your paper look cool?
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]
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]
COMMENTS