Why do electrons enter the 4s orbital before entering the 3d orbital?
o a. because the 3d orbital is at a lower energy level
ob. because both the 4s and 3d orbitals are at the same energy level
o c. because the 4s orbital is at a lower energy level
od. because the 4s orbital is at a higher energy level
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2-bromo-2-methylbutane undergoes an e1 elimination reaction in the presence of ethanol. in the next reaction only one of the possible products is represented. although the product shown is not the major product of the reaction, notice that there is more than one way it can be produced. complete the mechanism and draw the missing substances.