Carbon Chemistry and Living Systems
Science

Compounds with the same chemical formula but different physical structures
Isomer
Compounds with the same chemical formula but different physical structures. Isomer. An isomer is a molecule that has the same number of atoms of each element as another molecule but is arranged differently, leading to different properties.

A hydrocarbon with one or more hydrogen atoms replaced by other atoms
Substituted hydrocarbon
A hydrocarbon with one or more hydrogen atoms replaced by other atoms. Substituted hydrocarbon. In simple terms, a substituted hydrocarbon is a molecule where atoms like chlorine or oxygen replace hydrogen atoms, changing its properties.

A hydrocarbon with one or more double or triple bonds between carbon atoms
Unsaturated hydrocarbon
A hydrocarbon with one or more double or triple bonds between carbon atoms. Unsaturated hydrocarbon. Unsaturated hydrocarbons are molecules that contain carbon atoms connected by double or triple bonds, making them more reactive than saturated hydrocarbons.