Question

tag all the sp hybridized carbon atoms in this molecule. if there are none, please check the box below. there are none.

Explanation:

Step1: Recall hybridization rule

Carbon with a triple - bond is sp hybridized.

Step2: Identify sp - hybridized carbons

In the given molecule $H - C - C\equiv C - H$, the two carbon atoms involved in the triple - bond ($C\equiv C$) are sp hybridized.

Answer:

The two carbon atoms in the triple - bond ($C\equiv C$) are sp hybridized.