Barium, Elemental

CAS RN:7440-39-3

Other Properties

Soft, ductile; pyrophoric when finely divided; emits yellow-green color in flame; dissolves in liquid ammonia; electromotive force (aq) barium(2+)/barium = -2.91 Volts
Reacts violently with acids, water and carbon tetrachloride; very easily oxidized
Naturally occurring isotopes /of barium/ 130, 132, 134, 135, 136, 137, 138; known radioactive isotopes: 117, 119-129, 131, 133, 139-149.
Barium Decay Pathways
Natural Isotopes

Isotope Relative % Abundance Half-life
Barium-130 0.106 Stable isotope
Barium-132 0.101 Stable isotope
Barium-134 2.417 Stable isotope
Barium-135 6.592 Stable isotope
Barium-136 7.854 Stable isotope
Barium-137 11.23 Stable isotope
Barium-138 71.70 Stable isotope
Alkaline-earth element of atomic number 56, Group IIA of Periodic Table; extrudable and machinable
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