Problem 1: Iridium, atomic number = 77, is a transition element located in period and group 8B.
Problem 2:
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Problem 3:
Iridium would exhibit magnetism because of unpaired d electrons.
Problem 4:
Because iridium is corrosion-resistant it would be insoluble in groundwater. Therefore, the iridium atoms would tend to remain in the sediment instead of being transported in water solutions
as metallic ions.
