Information valid for As-75 unless otherwise noted
[ATOM]

Arsenic

 [ATOM]

Basic Information


Symbol: As
Atomic Number: 33
Mass: 74.9216
Melting Point: 817
Boiling Point: 613
Number of Protons/Electrons: 33
Number of Neutrons: 42
Classification: Metalloid
Crystal Structure: Rhombohedral
Density: 5.72
Color: Gray

Atomic Structure

[Bohr Model of Arsenic]  
Number of Energy Levels: 4

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 5

Isotopes

Isotope Half Life
As-712.7 days
As-7226 hours
As-7380.3 days
As-7417.8 days
As-75Stable
As-7626.3 hours
As-7739 hours
As-799 minutes

Facts


Date of Discovery: Known to the ancients
Discoverer: Unknown
Name Origin: From the Greek word arsenikos and the Latin word arsenicum
Uses: Poison, conducts electricity, semiconductors
Obtained From: mispickel

Related Links

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