Instruction
Metals are basic elements that do not degrade any further, so they are able to persist in the environment. Metals may not always stay in the same form because they are able to react to form different compounds. Research a metal that was discussed in the textbook reading such as mercury, arsenic, or cadmium. Create a two page essay in length, discussing the following:

Your essay should be a cumulation of what you have learned throughout the course. For instance, if the metal has particular effects on a certain body system or organ, be sure to give information about these effects. 

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