Home

 About This Site
 Comments
 Help
 Links

 Window Version

 Show Table With:
   Name
   Atomic Number
   Atomic Mass
   Electron Configuration
   Number of Neutrons
   Melting Point
   Boiling Point
   Date of Discovery
   Crystal Structure

 Element Groups:
   Alkali Metals
   Alkaline Earth Metals
   Transition Metals
   Other Metals
   Metalloids
   Non-Metals
   Halogens
   Noble Gases
   Rare Earth Elements

 

Astatine at Chemical Elements.com
Basic Information | Atomic Structure | Isotopes | Related Links | Citing This Page


Basic Information


Name: Astatine
Symbol: At
Atomic Number: 85
Atomic Mass: (210.0) amu
Melting Point: 302.0 °C (575.15 K, 575.6 °F)
Boiling Point: 337.0 °C (610.15 K, 638.6 °F)
Number of Protons/Electrons: 85
Number of Neutrons: 125
Classification: Halogen
Crystal Structure: Unknown
Density @ 293 K: Unknown
Color: Unknown


Atomic Structure

[Bohr Model of Astatine]  
Number of Energy Levels: 6

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 32
    Fifth Energy Level: 18
    Sixth Energy Level: 7

Isotopes

Isotope Half Life
At-20629.4 minutes
At-2081.6 hours
At-2117.2 hours
At-2150.1 milliseconds
At-21732.0 milliseconds
At-2181.6 seconds
At-21950.0 seconds

Facts


Date of Discovery: 1940
Discoverer: D.R. Corson
Name Origin: From the Greek word astatos (unstable)
Uses: No uses known
Obtained From: Man-made

Related Links

I currently do not know of any links for Astatine. If you do, please let me know

MLA Format for Citing This Page


Bentor, Yinon. Chemical Element.com - Astatine. <http://www.chemicalelements.com/elements/at.html>.

For more information about citing online sources, please visit the MLA's Website.

This page was created by Yinon Bentor.
Use of this web site is restricted by this site's license agreement.
Copyright © 1996-2012 Yinon Bentor. All Rights Reserved.