Trace Element (Metal and metalloid) cycling 1.Rank the bioavailability/mobility

Trace Element (Metal and metalloid) cycling
1.Rank the bioavailability/mobility of K+, Zn2+, and Al3+.
2.What effect does chelation have on metal bioavailability, and why?
3.Be able to explain how chelation works.
4.How do metal and metalloid cycling differ and why?
5.What else besides chelation affects metal availability and why (at least two factors)?

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