👉 Stereochemistry is a branch of chemistry that studies the arrangement of atoms in molecules, typically with respect to their relative positions. In other words, it deals with the way atoms are arranged in compounds and molecules. In simple terms, when you have two groups of atoms bonded together, they can be arranged in different ways. For example: - Group 1 (H, H) bonded to group 2 (C, C) - Group 3 (O, O) bonded to group