| A | B |
| hydrocarbon | organic compound composed of only two elements, carbon and hydrogen |
| saturated hydrocarbon | hydrocarbon where each carbon atom is single bonded to four other atoms |
| alkane | saturated hydrocarbon where all C to C bonds are single bonds |
| unsaturated hydrocarbon | hydrocarbon where not all of the carbon atoms are bonded to four other atoms, there is at least one C to C double or triple bond |
| alkene | unsaturated hydrocarbon with at least one C to C double bond |
| alkyne | unsaturated hydrocarbon with at least one C to C triple bond |
| methane | one carbon alkane |
| ethane | two carbon alkane |
| propane | three carbon alkane |
| butane | four carbon alkane |
| pentane | five carbon alkane |
| hexane | six carbon alkane |
| heptane | seven carbon alkane |
| octane | eight carbon alkane |
| nonane | nine carbon alkane |
| decane | ten carbon alkane |
| methyl- | prefix used to name a one carbon branch from a carbon chain of a hydrocarbon |
| ethyl- | prefix used to name a two carbon branch from a carbon chain of a hydrocarbon |
| propyl- | prefix used to name a three carbon branch from a carbon chain of a hydrocarbon |
| butyl- | prefix used to name a four carbon branch from a carbon chain of a hydrocarbon |
| pentyl- | prefix used to name a five carbon branch from a carbon chain of a hydrocarbon |
| hexyl- | prefix used to name a six carbon branch from a carbon chain of a hydrocarbon |
| heptyl- | prefix used to name a seven carbon branch from a carbon chain of a hydrocarbon |
| octyl- | prefix used to name a eight carbon branch from a carbon chain of a hydrocarbon |
| nonyl- | prefix used to name a nine carbon branch from a carbon chain of a hydrocarbon |
| decyl- | prefix used to name a ten carbon branch from a carbon chain of a hydrocarbon |
| ethene | two carbon unsaturated hydrocarbon with one C to C double bond |
| ethyne | two carbon unsaturated hydrocarbon with one C to C triple bond |
| 2-methyl propane | three carbon alkane with a one carbon branch from second carbon atom |
| 2-ethyl butane | four carbon alkane with a two carbon branch from second carbon atom |
| 2-propyl octane | eight carbon alkane with a three carbon branch from second carbon atom |
| 2-dimethyl octane | eight carbon alkane with two one carbon branches from second carbon atom |
| 2-ethyl 3-methyl 4-propyl octane | eight carbon alkane with 2 carbon branch from second carbon atom, 1 carbon branch from third carbon, and 3 carbon branch from fourth carbon |
| isomer | organic compounds with the same molecular formula but different structural formulas |
| 1-butene | four carbon unsaturated hydrocarbon with double bond between first and second carbon atom |
| 2-butene | four carbon unsaturated hydrocarbon with double bond between second and third carbon atom |
| 2-methyl 1-pentene | five carbon unsaturated hydrocarbon with double bond between first and second carbon atom and a 1 carbon branch from second carbon atom |
| 1-butyne | four carbon unsaturated hydrocarbon with triple bond between first and second carbon atom |
| 2-butyne | four carbon unsaturated hydrocarbon with triple bond between second and third carbon atom |
| 1,3 butadiene | four carbon unsaturated hydrocarbon with two double bonds one between first and second carbon atom and another between third and fourth carbon atom |
| cis isomer | one with both identical groups on the same side of a double bond |
| trans isomer | one with both identical groups on opposite sides of a double bond |