All of the following statements are true EXCEPT * O all atoms of a given element have the same mass number
for any neutral atom, the number of electrons is equal to the number of protons
the atomic number equals the number of protons in an atom
isotopes of atoms contain the same number of protons, but different number of
neutrons

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