4 a) Write the chemical formula for the simplest pentene isomer, b) give the name of the two isomers that have pentene as the base chain, c) give the name of the three isomers that have butene as the base chain, d) give the name of the 5 chain cyclic isomer, e) give the name of the 4-chain cyclic isomer, f) give the name of the three 3-chain cyclic isomers. (There are ten isomers - exclude the structural isomers), (g) Name all the saturated isomers., (h) Why are the others not saturated?

The three names of isomers?