Is the only difference between alkanes and alkenes is that one is double bonded?

Question

Is the only difference between alkanes and alkenes is that one is double bonded?

Answer 1

well from that difference alone arises a whole set of different properties.  

Answer 2

Here's a full list of the Classification of Hydrocarbons.

1...Aliphatic Alkanes and Alkenes:

*..Alkanes: Saturated, (Straight chain (normal) single bond or Branch chain (Iso) single bond.

*..Alkenes: Unsaturated (Olefins), (Straight chain (normal) with 1 double bond or Branch chain (Iso), with 1 double bond.

(Alkynes (triple bond) and Alka-dienes (2 double bonds) also fall into the Unsaturated Aliphatic group).

2...Cyclic Alkanes and Alkenes:

*..Cyclo-alkanes: Saturated (single bond, ring structure) (Naphthenes).

*..Cyclo-Alkenes: Unsaturated (1 double bond, ring structure.

(Also In the Cyclic Unsaturated compounds are the Cyclo-Alkadienes and  the Aromatics (based on the Benzene ring)).

Answer 3

Yes .

formula of alkanes CnH2n+2

formula of alkenes CnH2n

The consequences are that alkanes have a low chemical reactivity whereas alkenes are more reactive since a double bound can give reacions such as addition, bromination&

Answer 4

Essentially yes.

Alkanes are saturated hydrocarbons ... containing only single bonds.

Alkenes contain a C=C bond which confers upon them the typical properties of the alkenes.