E-Z isomerism (also known as cis-trans isomerism or Geometric isomerism) is a type of stereoisomerism in which the same groups are arranged differently. The general approach of the E-Z system is to observe the two groups at the end of each double bond.

E-Z isomerism Stereoisomerism occurs when substances have the same molecular formula, but a different arrangement of their atoms in space. E-Z isomerism is one type of this isomerism. It applies to: alkenes and other organic compounds that contain C=C bonds cyclic alkanes.

Cis-trans and E-Z naming systems are used to identify geometric isomers. Using the E-Z system we have: E-isomer : the higher priority groups are on opposite sides of the double bond. Z-isomer: the higher priority groups are on the same side of the double bond.

Stereoisomerism occurs when two molecules have the same molecular and structural formula, but atoms within the molecules are arranged in space differently. Z and E notation is used to name alkene based stereoisomers. In Z isomers, the highest priority groups bonded to each carbon in the double bond are pointing in the same direction.

E and Z isomerism is a type of stereoisomerism, which is a type of isomerism that arises due to differences in the spatial arrangement of atoms in molecules. Steroisomers have the same molecular formula and connectivity of atoms, but differ in their three-dimensional orientation or arrangement.