Cis and trans isomers are positional isomers of a molecule. Consider something such as PtCl2Br2 which is a square planar complex Pt sits in the middle with each of the ligands (in this case the...
Trans fats are hydrogenated unsaturated fats and they are supposed to be the worst fats there are for your health. Unsaturated fats are healthy fats and saturated fats and trans fats are unhealthy...