Step 1: Understand what an alkyne is. An alkyne is a type of hydrocarbon that contains at least one triple bond between carbon atoms.
Step 2: Know the difference between terminal and internal alkynes. A terminal alkyne has the triple bond at the end of the carbon chain, while an internal alkyne has the triple bond between two carbon atoms in the middle of the chain.
Step 3: Look at the structure of 1-butyne. It has the formula C4H6 and its structure is CH≡C-CH2-CH3.
Step 4: Identify the position of the triple bond in 1-butyne. The triple bond (≡) is between the first carbon (C1) and the second carbon (C2), making it the end of the carbon chain.
Step 5: Conclude that since the triple bond is at the end of the carbon chain, 1-butyne is a terminal alkyne.
