Information valid for Ba-137 unless otherwise noted
[ATOM]

Barium

 [ATOM]

Basic Information


Symbol: Ba
Atomic Number: 56
Mass: 137.327
Melting Point: 725
Boiling Point: 1140
Number of Protons/Electrons: 56
Number of Neutrons: 81
Classification: Alkaline Earth
Crystal Structure: Cubic
Density: 3.51
Color: Silver

Atomic Structure

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

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

Isotopes

Isotope Half Life
Ba-130Stable
Ba-13111.7 days
Ba-132Stable
Ba-13310.5 years
Ba-133m1.6 days
Ba-134Stable
Ba-135Stable
Ba-135m1.2 days
Ba-136Stable
Ba-137Stable
Ba-137m2.6 minutes
Ba-138Stable
Ba-1391.4 hours
Ba-14012.8 days
Ba-14118.3 minutes
Ba-14210.7 minutes

Facts


Date of Discovery: 1808
Discoverer: Sir Humphrey Davy
Name Origin: From the Greek word barys (heavy)
Uses: No uses known
Obtained From: barytine, whiterite

Related Links

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