What bonding feature allows you to differentiate among an alkane, alkene, alkyne, and an aromatic?

Question

Skylar Alexander · Accepted Answer

The number of electrons involved in the bonding. Also bonds angles and distances between atoms.

The basic difference from this groups is the number of electrons involved in the bonding. 2 electrons for an alkene (single bond), 4 electrons for an alkene (double bond), 6 electrons for an alkyne (triple bond), and for aromatic group it's a double bond too but in this case the electrons are in 'resonance'.
The number of electrons involved affects the strength of the bond so a triple bond is stronger than a double bond, and a double is stronger than a single bond. So if the bond is stronger the atoms are closer, and the bond angle is wider.

Easton Jones · Answer

undefined The bonding feature that allows you to differentiate among an alkane, alkene, alkyne, and an aromatic compound is the type of bonds present between carbon atoms. Alkanes contain only single bonds (C-C), alkenes contain at least one double bond (C=C), alkynes contain at least one triple bond (C≡C), and aromatics contain delocalized pi electrons within a ring structure, often represented by a resonance hybrid of multiple resonance structures.