Questions and problems

Using Internet resources, look up cyanobacteria and their influence on Earth s early atmosphere. What were these microorganisms formerly called Describe how their activities made possible the emergence of millions of new species. Describe a modern-day environmental pollution problem caused by cyanobacteria. 

Based on the deflnition of environmental chemistry at the beginning of this chapter, suggest five environmental spheres. Which of these is the anthrosphere, and of what does it consist  

From its name, suggest the meaning of a command-and-control approach to maintaining environmental quality. What are some of the limitations of such an approach In which respects is the practice of green chemistry a more natural way of maintaining environmental quality  

How many electrons, protons, and neutrons does it have What is its atomic number Give the name and chemical symbol of the element of which it is composed. 

Give the numbers of electrons, protons, and neutrons in each of the atoms represented below. Give the atomic numbers, names, and chemical symbols 

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Select end of chapter Questions and Problems may be assigned in OWL and are cross-referenced in the Key Concepts list... 

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