86. Solving a chemistry problem
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86. Solving a chemistry problem
64. What is called the electronic formula and electronic configuration of an atom or ion? What form do they have for the following atoms and ions: Na and Na, Ca and Ca 2, Al and Al 3, Cl and Cl-, S and S-2, Br- and K? Which of these electrons have the electronic structure of Ne, Ar, Kr atoms?
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