В ионе X⁴⁺ электронов на 2 больше, чем в Y²⁻. На сколько больше электронов в ионе X³⁻ по сравнению с Y⁺?

  1. 12
  2. 10
  3. 8
  4. 5

📝 Detailed explanation

Пусть Z(X)=a, Z(Y)=b. a−4 = b+2+2 → a = b+8. Разность: (a+3) − (b−1) = a−b+4 = 12.
48 / 71 (68%)
Question 48 of 71
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