Metals

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Across
  1. 2. Metal toxic in high amounts, symbol Pb (4)
  2. 4. Essential metal for nerve function (8)
  3. 5. Heavy metal causing Minamata disease (7)
  4. 7. Essential metal in hemoglobin (4)
  5. 8. Metal needed for enzyme function (4)
  6. 9. Trace metal needed for insulin function (5)
Down
  1. 1. Metal found in chlorophyll (9)
  2. 2. Metal used in batteries, harmful in excess (6)
  3. 3. Metal that can contaminate water and soil (6)
  4. 6. Metal important for bone health (7)