Information valid for At-210 unless otherwise noted
[ATOM]

Astatine

 [ATOM]

Basic Information


Symbol: At
Atomic Number: 85
Mass: (210)
Melting Point: 302
Boiling Point: 337
Number of Protons/Electrons: 85
Number of Neutrons: 125
Classification: Halogen
Crystal Structure: Unknown
Density: 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 milliseconds
At-2181.6 seconds
At-21950 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

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