If a fatty acid contains three or more double bonds between the carbons in the carbon chains, it would be

 Unsaturated Fatty Acids

Explanation:  Fatty acid is a long chain of hydrocarbon including a carboxylic group at terminal carbon.

Thus when the fatty acids contain three or ore double bonds between the carbon chains the hydrocarbon chain, it is said to be Unsaturated Fatty Acids.

Unsaturated bonds ae the bonds in which there is a presence of double bonds or triple bonds. These do not come under the category of saturated bonds. Saturated bonds are the single bonds.

i wish i could but this one is weird give me abc and i can solve it.

b) nuclear ive learned that in a pedtrodic table