Укажите верное утверждение.

  1. Mr(H) = 1 г/моль
  2. mₐ(Na) = 23 а.е.м.
  3. Ar(O) = 16 а.е.м.
  4. mₐ(F) = 19Nₐ
35 / 76 (46%)
Question 35 of 76
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