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10 Nov 2019
What factors determine whether an element is a conductor, semiconductor, or insulator? How are these properties connected with the three main classifications of elements in the periodic table (metal, metalloid, nonmetal)? Why is it so difficult to produce pure metals? Include a discussion of the three common steps required to obtain pure metals. Why is aluminum so versatile, yet was not produced in commercial quantities until after about 1885? Why are the halogens so important? The so-called CHON elements (carbon, hydrogen, oxygen, and nitrogen) are the commonest elements in organic life. Two more elements, sulfur and phosphorus, are also quite important, as well as having similar chemistry to oxygen and nitrogen, respectively. Give one use each of sulfur and phosphorus, whether organic or otherwise, and describe why these elements are also important.
What factors determine whether an element is a conductor, semiconductor, or insulator? How are these properties connected with the three main classifications of elements in the periodic table (metal, metalloid, nonmetal)? Why is it so difficult to produce pure metals? Include a discussion of the three common steps required to obtain pure metals. Why is aluminum so versatile, yet was not produced in commercial quantities until after about 1885? Why are the halogens so important? The so-called CHON elements (carbon, hydrogen, oxygen, and nitrogen) are the commonest elements in organic life. Two more elements, sulfur and phosphorus, are also quite important, as well as having similar chemistry to oxygen and nitrogen, respectively. Give one use each of sulfur and phosphorus, whether organic or otherwise, and describe why these elements are also important.
Deanna HettingerLv2
15 Jul 2019