The smell is determined not by the chemical composition or structure, but the geometric shape of the molecule, which falls on the membranes of the olfactory receptors, interacting with the proteins of the membrane and generating nerve impulses. Therefore, substances whose molecules have the same shape smell the same. Scientists distinguish between 7 and 9 primary odors, for example, flower odor is caused by molecules shaped like a disk with tails, mint odor is created by wedge-shaped molecules, ethereal odor is characteristic of stick-shaped molecules.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.