What is an ion? Formulate the first statement of the atomic-molecular doctrine, taking this concept into account.

Ions are positively or negatively charged particles that are formed from atoms or groups of atoms. Substances can consist of atoms, molecules, ions, i.e. substances are of molecular and non-molecular structure.

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.