Amolecule has one carbon-carbon double bond and four monovalent atoms or groups. how many different geometric isomers exist for this molecule?

When there is different arrangement of atoms in a compound but having the save molecular formula, these are called isomers of that compound. These isomers also have different properties due to the change of arrangement of atoms or different structure.

14 days is the half-life of phosphorus-32

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.