một nguyên tử có tổng số hạt cơ bản là 24. Trong hạt nhân số proton bằng số nơ tron. Xác định số khối của nguyên tử đó

The correct answer is b

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na

Is there a picture or answer choices?

Ineed with this also i hope you understand it