Barium Ba Atomic Number: 56 Atomic Mass: 137-327 Half Life: 2.6min-10.5yrs ______________________________________________________________________________ Sources: - Drilling mud, paints, bricks, tiles, brazil nuts, seaweed, fish, coal combustion - Barium sulfate (for X-Ray use) not water soluble, not toxic others are Adverse Effects: - Acute: paralysis - Chronic: hypertension, cardiac dysrythmia, muscle weakness