18. Solving a chemistry problem

29. Compose electronic formulas and graphically represent the distribution of electrons in quantum cells for those indicated in Table. 2 elements that match your task. Use the diagrams from the textbook (1, ch. 2, § 6, pp. 42-45). Analyze the possibilities of separation of paired electrons during the excitation of atoms with the formation of valence electrons in accordance with the theory of spin-valence.

29 chlorine, beryllium