104 Задачка по химии №010 498

37. a) Write the electronic formula of an atom of an element with atomic number 24, taking into account that one 4s-electron “falls” to the 3d-sublevel. What is the maximum spin of d-electrons in an atom of this element?
b) How does the method of valence bonds (BC) explain the pyramidal structure of the PH3 molecule?

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