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

Basic Information

Name: Antimony
Symbol: Sb
Atomic Number: 51
Atomic Mass: 121.76 amu
Melting Point: 630.0 °C (903.15 K, 1166.0 °F)
Boiling Point: 1750.0 °C (2023.15 K, 3182.0 °F)
Number of Protons/Electrons: 51
Number of Neutrons: 71
Classification: Metalloid
Crystal Structure: Rhombohedral
Density @ 293 K: 6.684 g/cm3
Color: bluish

Atomic Structure

[Bohr Model of Antimony]  
Number of Energy Levels: 5

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


Isotope Half Life
Sb-1172.8 hours
Sb-11938.1 hours
Sb-12015.89 minutes
Sb-1222.7 days
Sb-12460.2 days
Sb-1252.75 years
Sb-12612.4 days
Sb-126m19.0 minutes
Sb-1273.84 days
Sb-1294.4 hours


Date of Discovery: Known to the ancients
Discoverer: Unknown
Name Origin: From the Greek words anti (opposed) and monos (solitude), hence "not alone"
Symbol Origin: From stibium, the ancient name for antimony sulfide
Uses: hardens lead, plastics, chemicals
Obtained From: stibnite, valentinite

Related Links

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MLA Format for Citing This Page

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

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