BaZ =  56

From the Greek "barys", meaning "heavy"
(AM) Atomic Mass 137.327  amu    Oxidation States +2
   (BP) Boiling Point 1640  °C    (MP) Melting Point 725  °C
   (ρ) Density 3.5  g/cm3    Crystal Structure Body Centered Cubic
   ( χ ) Electronegativity 0.9    (AR) Atomic Radius 1.98  Å
   Physical State Solid (C) Heat Capacity 0.204  J/g °C
Electronic-Config [Xe]  6s2     (I1) First Ionization E 502.88  kJ/mol
   (ΔHvap) Heat of Vaporization 140.3  kJ/mol     (ΔHfus) Heat of Fusion 7.12  kJ/mol
   Year of Discovery 1808    Location of Discovery England
(E°) Standard Potential Ba2+⇔ Ba (-2.912 V)
Stable isotopes  130Ba,  132Ba,  134Ba,  135Ba,  136Ba,  137Ba,  138Ba
Discovered/Synthesized by Sir Humphry Davy
Natural Source The mineral/ore barite
Common Uses Stomach X-Ray contrast enhancer, green fireworks, whitener and filler for paper
Other Info Opaque to X-rays
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