An atom in the ordinary state is electrically neutral, and the electrons are negatively charged, then the positive charge of the nucleus is equal in absolute value to the total negative charge of all electrons. The number of electrons Z in an atom is equal to the ordinal number of the element in the table of D.I. Mendeleev, therefore, q = Ze.
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.