A fatty acid that contains a chain of 10 carbons and one double bond is termed a decanoic acid or capric acid.

Here's why:

* Deca refers to 10 carbons.

* -oic acid is the suffix used for saturated fatty acids.

* Capric acid is the common name for decanoic acid.

However, since it has a double bond, it is more specifically a monounsaturated decanoic acid.