Answer the following question given this paragraph: 

The difference between aldehydes and ketones is the placement of the carbonyl group within the molecule. An aldehyde is an organic compound in which the carbonyl group is attached to a carbon atom at the end of a carbon chain. A ketone is an organic compound in which the carbonyl group is attached to a carbon atom within the carbon chain. The general formulas for each are shown below.


Q: The difference between aldehydes and ketones is the placement of what group within the molecule?


A:
carbonyl