Root Words :- It indicates continuous chain of carbon atoms.
Chain LengthRoot WordChain LengthRoot Word

C1

Meth-

C13

Tridec-

C2

Eth-

C14

Tetradec-

C3

Prop-

C15

Pentadec-

C4

But-

C16

Hexadec-

C5

Pent-

C20

Eicos-

C6

Hex-

C21

Uneicos-

C7

Hept-

C30

Tricont-

C8

Oct-

C40

tetracont-

C9

Non-

C50

Pentacont-

C10

Dec-

C60

Hexacont-

C11

Undec-

C64

Tetrahexacont-

C12

Dodec-

C100

Cent-