Final answer:
A tertiary hydrogen, on a carbon atom with only one hydrogen attached, is called a tertiary proton.
Step-by-step explanation:
A tertiary hydrogen, on a carbon atom with only one hydrogen attached, is called a tertiary proton. In organic chemistry, carbon atoms can be classified as primary, secondary, tertiary, or quaternary based on the number of carbon atoms bonded to them. The tertiary carbon has three carbon atoms bonded to it, and the hydrogen attached to it is called a tertiary hydrogen. An example of a molecule with a tertiary hydrogen is 2-methyl-2-propanol.